Examples with solutions for Power of a Power: System of equations with no solution

Exercise #1

Insert the corresponding expression:

(62)7= \left(6^2\right)^7=

Video Solution

Step-by-Step Solution

To solve this problem, we need to simplify the expression (62)7 \left(6^2\right)^7 using the power of a power rule.

The power of a power rule states that when you have an expression of the form (am)n (a^m)^n , this can be simplified to am×n a^{m \times n} .

Let's apply this rule to the given expression:

1. Identify the base and exponents: - Base: 6 6 - First exponent (inside parenthesis): 2 2 - Second exponent (outside parenthesis): 7 7

2. Apply the power of a power rule: - Simplify (62)7=62×7 (6^2)^7 = 6^{2 \times 7} .

3. Calculate the final exponent: - Multiply the exponents: 2×7=14 2 \times 7 = 14 . - Therefore, the simplified expression is 614 6^{14} .

Considering the answer choices provided:

  • Choice 1: 62×7 6^{2 \times 7} (Correct, as per our solution).
  • Choice 2: 62+7 6^{2 + 7} (Incorrect, addition is used instead of multiplication).
  • Choice 3: 672 6^{7-2} (Incorrect, subtraction is used incorrectly).
  • Choice 4: 672 6^{\frac{7}{2}} (Incorrect, division is used incorrectly).

Thus, the correct answer to the problem is 62×7 6^{2 \times 7} , which simplifies to 614 6^{14} , and aligns with Choice 1.

Answer

62×7 6^{2\times7}

Exercise #2

Insert the corresponding expression:

(45)2= \left(4^5\right)^2=

Video Solution

Step-by-Step Solution

To solve this problem, let's carefully follow these steps:

  • Step 1: Identify the base and exponents in the expression.
  • Step 2: Use the power of a power rule to simplify the expression.
  • Step 3: Choose the appropriate option from the given answer choices.

Now, let's break this down:

Step 1: The expression given is (45)2(4^5)^2. Here, the base is 4, the inner exponent is 5, and the outer exponent is 2.

Step 2: We apply the power of a power rule for exponents, which states that (am)n=amn(a^m)^n = a^{m \cdot n}.

Using the rule, we have:

(45)2=452=410 (4^5)^2 = 4^{5 \cdot 2} = 4^{10}

This means the expression (45)2(4^5)^2 can be simplified to 4104^{10}.

Step 3: From the answer choices provided, we need to select the one corresponding to 4524^{5 \cdot 2}:

  • Choice 1: 4254^{\frac{2}{5}} - This is incorrect because it deals with division of exponents and not multiplication.
  • Choice 2: 4524^{5-2} - This is incorrect as it incorrectly subtracts the exponents.
  • Choice 3: 45×24^{5 \times 2} - This is the correct choice.
  • Choice 4: 45+24^{5+2} - This is incorrect as it incorrectly adds the exponents.

Therefore, the solution to the problem is 45×2=4104^{5 \times 2} = 4^{10}, which corresponds to choice 3.

Answer

45×2 4^{5\times2}

Exercise #3

Insert the corresponding expression:

(32)4= \left(3^2\right)^4=

Video Solution

Step-by-Step Solution

To solve this problem, we'll utilize the Power of a Power rule of exponents, which states:

(am)n=amn (a^m)^n = a^{m \cdot n}

Given the expression (32)4 (3^2)^4 , we need to simplify this by applying the rule:

  • Step 1: Recognize that we have a base of 3, with an exponent of 2, raised to another exponent of 4.
  • Step 2: According to the Power of a Power rule, we multiply the exponents: 2×4 2 \times 4 .
  • Step 3: Compute the product of the exponents: 2×4=8 2 \times 4 = 8 .
  • Step 4: Rewrite the expression as a single power: 38 3^8 .

This simplifies the original expression (32)4 (3^2)^4 to 38 3^{8} .

Comparing this with the given choices:

  • Choice 1: 32×4 3^{2 \times 4} is equivalent to 38 3^8 , confirming it matches our solution.
  • Choices 2, 3, and 4 involve incorrect operations with exponents (addition, subtraction, division) and therefore do not align with the necessary Power of a Power rule.

Thus, the correct answer to the problem is:

38 3^{8} , and this corresponds to Choice 1: 32×4 3^{2 \times 4} .

Answer

32×4 3^{2\times4}

Exercise #4

Insert the corresponding expression:

(22)3= \left(2^2\right)^3=

Video Solution

Step-by-Step Solution

We are given the expression (22)3 (2^2)^3 and need to simplify it using the laws of exponents and identify the corresponding expression among the choices.

To simplify the expression (22)3 (2^2)^3 , we use the "power of a power" rule, which states that (am)n=am×n(a^m)^n = a^{m \times n}.

Applying this rule to our expression, we have:

(22)3=22×3(2^2)^3 = 2^{2 \times 3}

Calculating the new exponent:

2×3=62 \times 3 = 6

Thus, the expression simplifies to:

262^6

Now, let's compare our result 262^6 with the given choices:

  • Choice 1: 22+3=252^{2+3} = 2^5 - Incorrect, as our expression evaluates to 262^6, not 252^5.
  • Choice 2: 223=212^{2-3} = 2^{-1} - Incorrect, as our expression evaluates to 262^6, not 212^{-1}.
  • Choice 3: 2232^{\frac{2}{3}} - Incorrect, as our expression evaluates to 262^6, not a fractional exponent expression.
  • Choice 4: 22×3=262^{2 \times 3} = 2^6 - Correct, as this matches our simplified expression.

Therefore, the correct choice is Choice 4: 22×32^{2 \times 3}.

Answer

22×3 2^{2\times3}

Exercise #5

Insert the corresponding expression:

(103)3= \left(10^3\right)^3=

Video Solution

Step-by-Step Solution

To solve this problem, we will proceed with the following steps:

  • Identify the expression structure.
  • Apply the power of a power rule for exponents.
  • Simplify the expression.

Now, let's work through each step in detail:

Step 1: Identify the expression structure.
We have the expression (103)3(10^3)^3. This indicates a power of a power where the base is 10, the inner exponent is 3, and the entire expression is raised to another power of 3.

Step 2: Apply the power of a power rule.
The rule states (am)n=am×n(a^m)^n = a^{m \times n}. Applying this to our specific expression gives us:

(103)3=103×3\left(10^3\right)^3 = 10^{3 \times 3}

Step 3: Perform the multiplication in the exponent.
Calculating 3×33 \times 3, we get 99. Thus, the expression simplifies to:

10910^9

Therefore, the solution to the problem is:

103×3\boxed{10^{3 \times 3}}

Examining the provided choices:

  • Choice 1: 103+310^{3+3} - Incorrect, because it uses addition instead of multiplication.
  • Choice 2: 103×310^{3 \times 3} - Correct, as it matches our derived expression.
  • Choice 3: 103310^{\frac{3}{3}} - Incorrect, because it uses division instead of multiplication.
  • Choice 4: 103310^{3-3} - Incorrect, because it uses subtraction instead of multiplication.

The correct answer is 103×310^{3 \times 3}, which is represented by Choice 2.

Answer

103×3 10^{3\times3}

Exercise #6

Insert the corresponding expression:

((2×3)2)5= \left(\right.\left(2\times3\right)^2)^5=

Video Solution

Step-by-Step Solution

To solve the problem, we will simplify the expression ((2×3)2)5\left(\left(2 \times 3\right)^2\right)^5 using the power of a power exponent rule. Follow these steps:

  • Step 1: Identify the form of the expression. The given expression is ((2×3)2)5\left(\left(2 \times 3\right)^2\right)^5.
  • Step 2: Apply the power of a power rule, which states that (am)n=am×n(a^m)^n = a^{m \times n}.
  • Step 3: Here, the base is 2×32 \times 3, the first exponent (mm) is 2, and the second exponent (nn) is 5.
  • Step 4: Multiply the exponents: 2×5=102 \times 5 = 10.

Therefore, the expression simplifies to (2×3)10\left(2 \times 3\right)^{10}. However, for the purpose of matching the form requested, it can be expressed as (2×3)2×5\left(2 \times 3\right)^{2 \times 5}.

Next, we evaluate the given choices:

  • Choice 1: (2×3)2+5\left(2 \times 3\right)^{2+5} — This incorrectly adds the exponents instead of multiplying them.
  • Choice 2: (2×3)52\left(2 \times 3\right)^{5-2} — This incorrectly subtracts the exponents.
  • Choice 3: (2×3)2×5\left(2 \times 3\right)^{2\times5} — This correctly multiplies the exponents, which we found is the right simplification.
  • Choice 4: (2×3)52\left(2 \times 3\right)^{\frac{5}{2}} — This introduces division of exponents, which is not applicable here.

The correct choice is Choice 3: (2×3)2×5\left(2 \times 3\right)^{2\times5}.

Answer

(2×3)2×5 \left(2\times3\right)^{2\times5}

Exercise #7

Insert the corresponding expression:

((4×6)3)4= \left(\right.\left(4\times6\right)^3)^4=

Video Solution

Step-by-Step Solution

To solve this problem, we'll use the power of a power property of exponents, which states that for any base aa and exponents mm and nn, (am)n=am×n(a^m)^n = a^{m \times n}.

  • Step 1: Identify the base and exponents:
    In the given expression ((4×6)3)4 \left(\left(4 \times 6\right)^3\right)^4, the base is (4×6)(4 \times 6), the inner exponent is 3, and the outer exponent is 4.

  • Step 2: Apply the power of a power rule:
    According to the rule, ((4×6)3)4\left((4 \times 6)^3\right)^4 simplifies to (4×6)3×4(4 \times 6)^{3 \times 4}.

  • Step 3: Calculate the new exponent:
    Multiply the exponents: 3×4=123 \times 4 = 12. Hence, the expression simplifies to (4×6)12 (4 \times 6)^{12} .

The expression ((4×6)3)4 \left(\left(4 \times 6\right)^3\right)^4 is equivalent to (4×6)3×4(4 \times 6)^{3 \times 4}. Therefore, the correct choice is:

(4×6)3×4 \left(4\times6\right)^{3\times4}

Therefore, the correct answer is Choice 1.

Answer

(4×6)3×4 \left(4\times6\right)^{3\times4}

Exercise #8

Insert the corresponding expression:

((3×8)5)6= \left(\right.\left(3\times8\right)^5)^6=

Video Solution

Step-by-Step Solution

To solve the problem, we need to simplify the expression ((3×8)5)6 \left(\left(3\times8\right)^5\right)^6 .

We will utilize the "power of a power" rule in exponents, which states (am)n=am×n (a^m)^n = a^{m \times n} . This rule tells us to multiply the exponents when raising a power to another power.

  • Step 1: Identify the expression to simplify: ((3×8)5)6 \left(\left(3 \times 8\right)^5\right)^6 .
  • Step 2: Apply the power of a power rule: This gives us (3×8)5×6 (3 \times 8)^{5 \times 6} .
  • Step 3: Multiply the exponents: 5×6=30 5 \times 6 = 30 .

Therefore, the expression simplifies to (3×8)30 (3 \times 8)^{30} .

Upon comparing this result with the provided answer choices, the correct choice is:

(3×8)5×6 \left(3\times8\right)^{5\times6}

This choice correctly applies the power of a power rule, thereby validating the solution as correct.

In conclusion, the simplified form of the expression is (3×8)30 (3 \times 8)^{30} , and the correct choice is option 4.

Answer

(3×8)5×6 \left(3\times8\right)^{5\times6}

Exercise #9

Insert the corresponding expression:

((10×2)7)3= \left(\right.\left(10\times2\right)^7)^3=

Video Solution

Step-by-Step Solution

To solve this problem, we'll simplify the expression ((10×2)7)3(\left(10 \times 2\right)^7)^3 using the rules of exponents:

  • Step 1: Identify the structure of the expression
  • Step 2: Apply the power of a power rule
  • Step 3: Verify the correctness of our answer with the provided choices

Now, let's work through each step:

Step 1: The expression ((10×2)7)3(\left(10 \times 2\right)^7)^3 involves two operations: the multiplication inside the parentheses and the power raised to another power outside.

Step 2: We use the power of a power rule (am)n=am×n(a^m)^n = a^{m \times n}. Applying this to the base (10×2)\left(10 \times 2\right) and the exponents 7 and 3, we have:

((10×2)7)3=(10×2)7×3(\left(10 \times 2\right)^7)^3 = \left(10 \times 2\right)^{7 \times 3}

This simplifies further to:

(10×2)21\left(10 \times 2\right)^{21}

Step 3: Now, let's verify with the given choices:
- Choice 1: (10×2)7+3\left(10 \times 2\right)^{7+3}, incorrect because it applies addition instead of multiplication of exponents.
- Choice 2: (10×2)7×3\left(10 \times 2\right)^{7 \times 3}, correct, as it correctly follows the power of a power rule.
- Choice 3: (10×2)73\left(10 \times 2\right)^{7-3}, incorrect because it subtracts exponents.
- Choice 4: (10×2)37\left(10 \times 2\right)^{\frac{3}{7}}, incorrect because it divides the exponents.

Therefore, the correct choice is Choice 2: (10×2)7×3\left(10 \times 2\right)^{7 \times 3}.

Hence, the simplified expression is (10×2)21\left(10 \times 2\right)^{21}.

Answer

(10×2)7×3 \left(10\times2\right)^{7\times3}

Exercise #10

Insert the corresponding expression:

((12×5)4)8= \left(\right.\left(12\times5\right)^4)^8=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the given expression

  • Step 2: Apply the appropriate exponent rule

  • Step 3: Simplify the expression

Now, let's work through each step:
Step 1: The problem gives us the expression ((12×5)4)8 ((12 \times 5)^4)^8 . Here, the base is 12×512 \times 5, and the exponents are 44 and 88 respectively.
Step 2: We'll use the Power of a Power Rule, which states (am)n=am×n(a^m)^n = a^{m \times n}. This rule allows us to combine the exponents by multiplying them together.
Step 3: Applying this rule, we rewrite the expression as:
((12×5)4)8=(12×5)4×8 ((12 \times 5)^4)^8 = (12 \times 5)^{4 \times 8}

Therefore, the simplified expression is (12×5)32 (12 \times 5)^{32} .

Now, let's consider the choices provided:

  • Choice 1: (12×5)4×8 \left(12 \times 5\right)^{4 \times 8} - This matches our simplified expression.

  • Choice 2: (12×5)84 \left(12 \times 5\right)^{8-4} - Incorrect because it subtracts exponents rather than multiplying them.

  • Choice 3: (12×5)4+8 \left(12 \times 5\right)^{4+8} - Incorrect because it adds exponents rather than multiplying them.

  • Choice 4: (12×5)84 \left(12 \times 5\right)^{\frac{8}{4}} - Incorrect because it divides exponents rather than multiplying them.

Hence, the correct choice is Choice 1: (12×5)32 (12 \times 5)^{32} .

Answer

(12×5)4×8 \left(12\times5\right)^{4\times8}

Exercise #11

Insert the corresponding expression:

((8×6)7)8= \left(\left(8\times6\right)^{-7}\right)^{-8}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll apply the power of a power rule for exponents. The problem is to simplify the expression ((8×6)7)8\left(\left(8\times6\right)^{-7}\right)^{-8}.

  • Step 1: Understand the Power of a Power Rule

The power of a power rule states that (am)n=am×n(a^m)^n = a^{m \times n}.

  • Step 2: Apply the Rule

Here, the base of the entire expression is 8×68 \times 6, the first exponent is 7-7, and the second exponent is 8-8. According to the rule, we multiply the exponents:

(8×6)7×8 (8 \times 6)^{-7 \times -8}

  • Step 3: Simplify the Exponent Calculation

Calculate the multiplication of the exponents:

7×8=56-7 \times -8 = 56

This results in the expression:

(8×6)56(8 \times 6)^{56}

Considering the given choices, carefully cross-check against our simplified expression:

  • Choice 1: (8×6)78 \left(8\times6\right)^{-7-8} is incorrect - it uses addition instead of multiplication.

  • Choice 2: (8×6)87 \left(8\times6\right)^{\frac{-8}{-7}} is incorrect - it uses division instead.

  • Choice 3: (8×6)7+8 \left(8\times6\right)^{-7+8} is incorrect - it uses addition as well.

  • Choice 4: (8×6)7×8 \left(8\times6\right)^{-7\times-8} is our correct transformation before final simplification.

After calculating, the expression (8×6)7×8=(8×6)56\left(8\times6\right)^{-7\times-8} = (8 \times 6)^{56}. The corresponding expression reflects Choice 4 before final simplification.

Answer

(8×6)7×8 \left(8\times6\right)^{-7\times-8}

Exercise #12

Insert the corresponding expression:

((2×4)2)4= \left(\left(2\times4\right)^{-2}\right)^4=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the expression given and simplify the base.
  • Step 2: Apply the Power of a Power Rule for exponents.
  • Step 3: Match the result with the provided answer choices.

Let's work through each step:

Step 1: The problem gives us the expression ((2×4)2)4\left(\left(2\times4\right)^{-2}\right)^4. First, simplify the base: 2×42 \times 4 equals 8, so the expression becomes (82)4\left(8^{-2}\right)^4.

Step 2: Apply the Power of a Power Rule, which states: (am)n=am×n(a^m)^n = a^{m \times n}. Here, a=8a = 8, m=2m = -2, and n=4n = 4. Calculate m×n=2×4=8m \times n = -2 \times 4 = -8.

Therefore, (82)4\left(8^{-2}\right)^4 simplifies to 888^{-8}, which can be expressed back in terms of the original base (2×4)(2 \times 4). So we write it as (2×4)8\left(2 \times 4\right)^{-8}.

Step 3: Check the given choices:

  • Choice 1: (2×4)2+4\left(2\times4\right)^{-2+4} represents an exponent of 2; incorrect.
  • Choice 2: (2×4)42\left(2\times4\right)^{\frac{4}{-2}} simplifies to -2; incorrect.
  • Choice 3: (2×4)24\left(2\times4\right)^{-2-4} simplifies to -6; incorrect.
  • Choice 4: (2×4)2×4=(2×4)8\left(2\times4\right)^{-2\times4} = \left(2\times4\right)^{-8}; correct.

Thus, the correct choice is Choice 4: (2×4)2×4\left(2\times4\right)^{-2\times4}.

Answer

(2×4)2×4 \left(2\times4\right)^{-2\times4}

Exercise #13

Insert the corresponding expression:

((3×5)3)6= \left(\left(3\times5\right)^{-3}\right)^{-6}=

Video Solution

Step-by-Step Solution

To simplify the expression ((3×5)3)6 \left(\left(3\times5\right)^{-3}\right)^{-6} , we apply exponent rules, specifically the power of a power rule.

Here's a step-by-step solution:

  • Step 1: Identify the structure of the expression: we have an outer exponent 6-6 and an inner exponent 3-3 applied to the base (3×5)(3 \times 5).

  • Step 2: Apply the power of a power rule, which states (am)n=amn(a^m)^n = a^{m \cdot n}. This combines the exponents being multiplied.

  • Step 3: Calculate the multiplication of the exponents: 3×6-3 \times -6. This yields 1818 since multiplying two negative numbers results in a positive number.

  • Step 4: Substitute back into the expression: (3×5)18\left(3 \times 5\right)^{18}.

Thus, the transformation of the original expression results in the new expression:

(3×5)3×6 \left(3\times5\right)^{-3\times-6}

Comparing with the provided choices, we see:

  • Choice 1: (3×5)3×6 \left(3\times5\right)^{-3\times-6} - This matches our solution.

  • Choices 2, 3, and 4 do not match the derived steps based on multiplying exponents.

Thus, the correct answer is choice 1: (3×5)3×6 \left(3\times5\right)^{-3\times-6} .

Answer

(3×5)3×6 \left(3\times5\right)^{-3\times-6}

Exercise #14

Insert the corresponding expression:

((6×2)4)5= \left(\left(6\times2\right)^4\right)^{-5}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll simplify the expression ((6×2)4)5\left(\left(6\times2\right)^4\right)^{-5} using exponent rules.

Here's a step-by-step breakdown of the solution:

  • Step 1: Identify the form
    The expression is ((6×2)4)5\left((6 \times 2)^4\right)^{-5}. This is a case of the power of a power: (am)n(a^m)^n, which can be rewritten as am×na^{m \times n}.
  • Step 2: Apply the power of a power rule
    Apply the rule: ((6×2)4)5=(6×2)4×(5)\left((6 \times 2)^4\right)^{-5} = (6 \times 2)^{4 \times (-5)}.
  • Step 3: Simplify the exponent
    Calculate the exponent multiplication: 4×(5)=204 \times (-5) = -20. Thus, the expression simplifies to (6×2)20(6 \times 2)^{-20}.

The resulting expression matches the format of choice 3: (6×2)4×5\left(6 \times 2\right)^{4\times-5}.

Therefore, the correct choice is Choice 3, (6×2)4×5 \left(6\times2\right)^{4\times-5} .

Answer

(6×2)4×5 \left(6\times2\right)^{4\times-5}

Exercise #15

Insert the corresponding expression:

((7×4)6)5= \left(\left(7\times4\right)^{-6}\right)^5=

Video Solution

Step-by-Step Solution

To simplify the expression ((7×4)6)5 \left(\left(7\times4\right)^{-6}\right)^5 , follow these steps, checking against the choices provided:

Step 1: Apply the power of a power rule.

  • The expression inside the parentheses 7×47\times4 acts as a single term aa.

  • Therefore, by applying (am)n=am×n(a^m)^n = a^{m \times n}, we simplify:

((7×4)6)5=(7×4)6×5 \left(\left(7\times4\right)^{-6}\right)^5 = \left(7\times4\right)^{-6 \times 5}

Step 2: Multiply the exponents.

  • Calculate 6×5=30-6 \times 5 = -30.

  • Hence, the expression simplifies to (7×4)30\left(7\times4\right)^{-30}.

Conclusion:

The correct simplified form of the expression is (7×4)6×5\left(7\times4\right)^{-6\times5}, aligning with choice 2 and your provided correct answer.

Answer

(7×4)6×5 \left(7\times4\right)^{-6\times5}

Exercise #16

Insert the corresponding expression:

((a×3)2)4= \left(\left(a\times3\right)^2\right)^4=

Video Solution

Step-by-Step Solution

To solve this problem, we'll apply the power of a power rule from exponents:

  • Step 1: Identify the base and the exponents involved.

  • Step 2: Apply the power of a power rule.

  • Step 3: Simplify the expression by multiplying the exponents.

Now, let's work through each step:
Step 1: The original expression is ((a×3)2)4\left(\left(a\times3\right)^2\right)^4. We recognize the base as a×3a \times 3 and see it is first raised to the power of 2, and then the result is raised to the power of 4.
Step 2: We'll use the power of a power property of exponents: (bm)n=bm×n(b^m)^n = b^{m \times n}. Here, bb can be considered as (a×3)(a \times 3), m=2m = 2, and n=4n = 4.
Step 3: Applying this property, we have ((a×3)2)4=(a×3)2×4\left(\left(a\times3\right)^2\right)^4 = \left(a\times3\right)^{2 \times 4}.
By multiplying the exponents, we get (a×3)8(a \times 3)^8, but to match the format requested in the choices, we simply express it as (a×3)2×4(a \times 3)^{2 \times 4}.

Therefore, the correct expression that corresponds to the given power structure is (a×3)2×4 \left(a\times3\right)^{2\times4} .

Analyzing the choices provided:

  • Choice 1: (a×3)42 \left(a\times3\right)^{4-2} applies an incorrect operation of subtraction.

  • Choice 2: (a×3)42 \left(a\times3\right)^{\frac{4}{2}} incorrectly divides the exponents.

  • Choice 3: (a×3)2×4 \left(a\times3\right)^{2\times4} correctly applies the power of a power rule.

  • Choice 4: (a×3)2+4 \left(a\times3\right)^{2+4} adds the exponents instead of multiplying.

The correct answer is clearly Choice 3: (a×3)2×4 \left(a\times3\right)^{2\times4} .

Answer

(a×3)2×4 \left(a\times3\right)^{2\times4}

Exercise #17

Insert the corresponding expression:

((4×x)5)3= \left(\left(4\times x\right)^5\right)^3=

Video Solution

Step-by-Step Solution

To solve this problem, we will apply the power of a power rule for exponents, which states that (am)n=am×n\left(a^m\right)^n = a^{m \times n}.

**Step-by-step Solution:**

  • Step 1: Identify the given information.

    • The expression is ((4×x)5)3\left(\left(4\times x\right)^5\right)^3.

    • The base is 4×x4\times x, the first exponent is 5, and the second exponent is 3.

  • Step 2: Apply the power of a power rule.

    • According to the rule: ((4×x)5)3=(4×x)5×3\left((4 \times x)^5\right)^3 = (4 \times x)^{5 \times 3}.

    • Multiply the exponents: 5×3=155 \times 3 = 15.

    • Thus, the expression simplifies to (4×x)15(4 \times x)^{15}.

Therefore, the simplified expression is (4×x)15(4 \times x)^{15}.

Choice Analysis:

  • The correct choice is:

    (4×x)5×3 \left(4\times x\right)^{5\times3}

    , which correctly applies the power of a power rule.

  • Incorrect choices:

    • : (4×x)5+3 (4\times x)^{5+3} – Incorrect, it adds exponents instead of multiplying.

    • : (4×x)53 (4\times x)^{\frac{5}{3}} – Incorrect, it uses division but should multiply exponents.

    • : (4×x)53 (4\times x)^{5-3} – Incorrect, it subtracts exponents instead of multiplying.

Answer

(4×x)5×3 \left(4\times x\right)^{5\times3}

Exercise #18

Insert the corresponding expression:

((a×x)7)2= \left(\left(a\times x\right)^7\right)^2=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Identify the given information: We have the expression ((a×x)7)2(\left(a \times x\right)^7)^2.
  • Apply the appropriate formula: Use the "power of a power" rule for exponents.
  • Perform the necessary calculations: Simplify the expression using the rule.

Now, let's work through each step:
Step 1: The expression given is ((a×x)7)2(\left(a \times x\right)^7)^2.
Step 2: According to the power of a power rule, (bm)n=bm×n(b^m)^n = b^{m \times n}. Hence, ((a×x)7)2=((a×x)7×2)(\left(a \times x\right)^7)^2 = (\left(a \times x\right)^{7 \times 2}).
Step 3: Perform the multiplication in the exponent, which results in ((a×x)14)(\left(a \times x\right)^{14}).

Therefore, the expression ((a×x)7)2(\left(a \times x\right)^7)^2 simplifies to (a×x)14(a \times x)^{14}.

Checking against the answer choices:

  • Choice 1: (a×x)72 \left(a\times x\right)^{7-2} simplifies to (a×x)5 \left(a\times x\right)^5 . Incorrect.
  • Choice 2: (a×x)27 \left(a\times x\right)^{\frac{2}{7}} . Incorrect application of exponent rules.
  • Choice 3: (a×x)7+2=(a×x)9 \left(a\times x\right)^{7+2} = \left(a\times x\right)^9 . Incorrect.
  • Choice 4: (a×x)7×2=(a×x)14 \left(a\times x\right)^{7\times2} = \left(a\times x\right)^{14} . Correct.

Given all these considerations, the correct choice is Choice 4: (a×x)14 \left(a\times x\right)^{14} , which corresponds to the correct application of the "power of a power" rule.

Answer

(a×x)7×2 \left(a\times x\right)^{7\times2}

Exercise #19

Insert the corresponding expression:

((x×b)5)8= \left(\left(x\times b\right)^5\right)^8=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the mathematical problem and the rule needed.
  • Step 2: Apply the power of a power rule to simplify the expression.
  • Step 3: Evaluate our simplification against the provided answer choices.

Now, let's work through each step:

Step 1: The problem involves simplifying the expression ((x×b)5)8\left(\left(x \times b\right)^5\right)^8, which is a power of a power. Our goal is to simplify it to a single power.

Step 2: According to the power of a power rule, (am)n=am×n(a^m)^n = a^{m \times n}. In this case, the base is (x×b)(x \times b) raised to the 5th power and that entire expression is further raised to the 8th power.

Applying the power of a power rule gives us:

((x×b)5)8=(x×b)5×8=(x×b)40 \left(\left(x \times b\right)^5\right)^8 = \left(x \times b\right)^{5 \times 8} = \left(x \times b\right)^{40}

Step 3: Compare this to the provided answer choices:

  • Choice 1: (x×b)5+8\left(x \times b\right)^{5+8} – This is incorrect as it adds the exponents instead of multiplying them.
  • Choice 2: (x×b)5×8\left(x \times b\right)^{5 \times 8} – This is correct as it applies the rule correctly to yield (x×b)40(x \times b)^{40}.
  • Choice 3: (x×b)85\left(x \times b\right)^{\frac{8}{5}} – This is incorrect and irrelevant to the power of a power rule.
  • Choice 4: (x×b)58\left(x \times b\right)^{5-8} – This is incorrect as it subtracts exponents, which is not applicable here.

Therefore, after careful analysis, the solution to the problem is the expression represented by Choice 2: (x×b)40\left(x \times b\right)^{40}.

Answer

(x×b)5×8 \left(x\times b\right)^{5\times8}

Exercise #20

Insert the corresponding expression:

((by)7)6= \left(\left(by\right)^7\right)^6=

Video Solution

Step-by-Step Solution

To solve this problem, we'll implement the following steps:

  • Step 1: Identify the initial expression that needs simplification: ((by)7)6 \left(\left(by\right)^7\right)^6 .
  • Step 2: Apply the "power of a power" rule, which states (xm)n=xm×n (x^m)^n = x^{m \times n} .
  • Step 3: Calculate the product of the exponents 77 and 66.

Let's explore each step in detail:
Step 1: We begin with the expression ((by)7)6 \left(\left(by\right)^7\right)^6 . This indicates (by)7(by)^7 is raised to another power, 6.

Step 2: According to the power of a power rule, we multiply the exponents:

(by)7×6=(by)42 (by)^{7 \times 6} = (by)^{42}

Step 3: The resulting expression is simplified and expressed as (b×y)42(b \times y)^{42}.

Therefore, the solution to the problem is (b×y)42 \left(b \times y\right)^{42} .

Now, comparing our result with the provided choice options:

  • Choice 1: (b×y)7+6 \left(b\times y\right)^{7+6} - Incorrect, because it adds the exponents, which violates the power of a power rule.
  • Choice 2: (b×y)7×6 \left(b\times y\right)^{7\times6} - Correct, as it reflects the calculated exponent multiplication: 4242.
  • Choice 3: (b×y)76 \left(b\times y\right)^{7-6} - Incorrect, because it subtracts the exponents, irrelevant in this context.
  • Choice 4: (b×y)67 \left(b\times y\right)^{\frac{6}{7}} - Incorrect, as it divides the exponents, not applicable here.

Thus, the correct answer is indeed Choice 2.

Answer

(b×y)7×6 \left(b\times y\right)^{7\times6}