Examples with solutions for Multiplication of Powers: Variables in the exponent of the power

Exercise #1

3x2x32x= 3^x\cdot2^x\cdot3^{2x}=

Video Solution

Step-by-Step Solution

In this case we have 2 different bases, so we will add what can be added, that is, the exponents of 3 3

3x2x32x=2x33x 3^x\cdot2^x\cdot3^{2x}=2^x\cdot3^{3x}

Answer

33x2x 3^{3x}\cdot2^x

Exercise #2

Reduce the following equation:

8a×82×8x= 8^a\times8^2\times8^x=

Video Solution

Step-by-Step Solution

To solve this problem, we'll use the property of exponents for multiplying powers with the same base:

  • Step 1: Identify that all terms have the same base, which is 88. The equation is given as 8a×82×8x8^a \times 8^2 \times 8^x.

  • Step 2: Apply the multiplication property of exponents: bm×bn=bm+nb^m \times b^n = b^{m+n}.

  • Step 3: Add the exponents: (a)+(2)+(x)(a) + (2) + (x) to get the new exponent for the single base.

By applying these steps, we obtain:

8a+2+x8^{a+2+x}

This result matches choice 1, confirming that this is the correct simplified expression.

Answer

8a+2+x 8^{a+2+x}

Exercise #3

Reduce the following equation:

2a×22= 2^a\times2^2=

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the common base
  • Step 2: Apply the property of exponents
  • Step 3: Simplify the expression

Now, let's work through each step:

Step 1: The problem gives us the expression 2a×22 2^a \times 2^2 . Here, the common base is 2.
Step 2: We'll apply the property of exponents, which states that for the same base, you add the exponents: bm×bn=bm+n b^m \times b^n = b^{m+n} . In this case, it will be 2a+2 2^{a+2} .
Step 3: Rewriting the expression using this rule, we get: 2a×22=2a+2 2^a \times 2^2 = 2^{a+2} .

Therefore, the solution to the problem is 2a+2 2^{a+2} .

Answer

2a+2 2^{a+2}

Exercise #4

52×5a×53= 5^2\times5^a\times5^3=

Video Solution

Step-by-Step Solution

To solve the expression 52×5a×535^2 \times 5^a \times 5^3, we will make use of the exponent rule for multiplication, which states that if you multiply powers with the same base, you add the exponents:

am×an=am+n a^m \times a^n = a^{m+n}

Let's apply this rule step by step:

  • Step 1: Identify the base of the power terms. In this problem, the base is 55.
  • Step 2: Write down all the exponents. The exponents we have are 22, aa, and 33.
  • Step 3: Add the exponents together:
    2+a+32 + a + 3.
  • Step 4: Simplify the sum: 2+a+3=5+a2 + a + 3 = 5 + a.
  • Step 5: Express the final result as a single power:
    The expression can be rewritten using the exponent rule as 55+a5^{5+a}.

Thus, the final simplified expression is 55+a 5^{5+a} .

Answer

55+a 5^{5+a}

Exercise #5

Reduce the following equation:

4x×42×4a= 4^x\times4^2\times4^a=

Video Solution

Step-by-Step Solution

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

  • Step 1: Confirm the given expression is 4x×42×4a 4^x \times 4^2 \times 4^a .
  • Step 2: Apply the exponent rule for multiplication of powers: if bm×bn=bm+n b^m \times b^n = b^{m+n} , use this with base 4.
  • Step 3: Add the exponents of each term.

Let's work through these steps:

Step 1: The expression we have is 4x×42×4a 4^x \times 4^2 \times 4^a .

Step 2: Since all parts of the product have the same base 4 4 , we can use the rule for multiplying powers: 4x×42×4a=4x+2+a 4^x \times 4^2 \times 4^a = 4^{x+2+a} .

Step 3: The simplified expression is obtained by adding the exponents: x+2+a x + 2 + a .

Therefore, the expression 4x×42×4a 4^x \times 4^2 \times 4^a simplifies to 4x+2+a 4^{x+2+a} .

Answer

4x+2+a 4^{x+2+a}

Exercise #6

34×3x= 3^4\times3^x=

Video Solution

Step-by-Step Solution

To solve this problem, we'll apply the exponent rule for multiplying powers with the same base.

  • Step 1: Identify the base. The base for both terms is 3.
  • Step 2: Apply the multiplication of powers rule. According to the rule, when multiplying powers with the same base, we add their exponents: 34×3x=34+x 3^4 \times 3^x = 3^{4+x} .
  • Step 3: Write down the simplified form of the expression. The simplified expression of 34×3x 3^4 \times 3^x is: 34+x 3^{4+x}

Therefore, the solution to the expression 34×3x 3^4 \times 3^x simplifies to 34+x 3^{4+x} .

Hence, the correct choice is 34+x 3^{4+x} , matching answer choice 1.

Answer

34+x 3^{4+x}

Exercise #7

4x×4x= 4^x\times4^x=

Video Solution

Step-by-Step Solution

To solve this problem, we will follow these steps:

  • Step 1: Identify the given expression and the operation.

  • Step 2: Apply the rule for multiplying powers with the same base.

  • Step 3: Simplify the expression to reach the final answer.

Let's proceed with the solution:
Step 1: We are given the expression 4x×4x4^x \times 4^x. Both terms have the same base of 4 and an exponent of xx.

Step 2: According to the exponent multiplication rule, am×an=am+na^m \times a^n = a^{m+n}. Here, since both bases are 4, we can simplify using this rule.

Step 3: We add the exponents, giving us:

4x×4x=4x+x=42x 4^x \times 4^x = 4^{x+x} = 4^{2x}

Therefore, the correct solution to the problem is 4x+x 4^{x+x} .

Answer

4x+x 4^{x+x}

Exercise #8

7x+1×7x= 7^{x+1}\times7^x=

Video Solution

Step-by-Step Solution

To solve the problem 7x+1×7x7^{x+1}\times7^x, follow these steps:

Step 1: Use the rule for multiplying powers with the same base:

aman=am+na^m \cdot a^n = a^{m+n}

Here, the base aa is 77, and the exponents are x+1x+1 and xx.

Step 2: Add the exponents:

The expression becomes 7(x+1)+x7^{(x+1) + x}.

Step 3: Simplify the exponents:

(x+1)+x=2x+1(x+1) + x = 2x + 1

Step 4: Write the final expression:

The simplified expression is 72x+17^{2x+1}.

Therefore, our solution matches choice 3.

The solution to the problem is 72x+1 7^{2x+1} .

Answer

72x+1 7^{2x+1}

Exercise #9

Reduce the following equation:

52x×5x= 5^{2x}\times5^x=

Video Solution

Step-by-Step Solution

To reduce the expression 52x×5x 5^{2x} \times 5^x , we will use the exponent multiplication rule:

When multiplying powers with the same base, add the exponents:
Thus, 52x×5x=52x+x 5^{2x} \times 5^x = 5^{2x + x} .

Hence, the correct choice is: 52x+x 5^{2x + x} .

Answer

52x+x 5^{2x+x}

Exercise #10

Reduce the following equation:

10a+b×10a+1×10b+1= 10^{a+b}\times10^{a+1}\times10^{b+1}=

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the exponents in the given expression.
  • Step 2: Use the property of exponents for multiplication by like bases.
  • Step 3: Add the exponents together and simplify.

Now, let's work through each step:

Step 1: The original expression is 10a+b×10a+1×10b+1 10^{a+b} \times 10^{a+1} \times 10^{b+1} .

Step 2: Since the base (10) is the same for all terms, we add the exponents:

(a+b)+(a+1)+(b+1) (a+b) + (a+1) + (b+1)

Step 3: Simplifying further:

a+b+a+1+b+1=2a+2b+2 a + b + a + 1 + b + 1 = 2a + 2b + 2

Thus, the expression simplifies to:

102a+2b+2 10^{2a + 2b + 2}

Therefore, the solution to the problem is 102b+2a+2 10^{2b+2a+2} .

Answer

102b+2a+2 10^{2b+2a+2}

Exercise #11

42y454y46= 4^{2y}\cdot4^{-5}\cdot4^{-y}\cdot4^6=

Video Solution

Step-by-Step Solution

We use the power property to multiply terms with identical bases:

aman=am+n a^m\cdot a^n=a^{m+n} We apply the property for this problem:

42y454y46=42y+(5)+(y)+6=42y5y+6 4^{2y}\cdot4^{-5}\cdot4^{-y}\cdot4^6= 4^{2y+(-5)+(-y)+6}=4^{2y-5-y+6} We simplify the expression we got in the last step:

42y5y+6=4y+1 4^{2y-5-y+6} =4^{y+1} When we add similar terms in the exponent.

Therefore, the correct answer is option c.

Answer

4y+1 4^{y+1}

Exercise #12

22x+12523x= 2^{2x+1}\cdot2^5\cdot2^{3x}=

Video Solution

Step-by-Step Solution

Since the bases are the same, the exponents can be added:

2x+1+5+3x=5x+6 2x+1+5+3x=5x+6

Answer

25x+6 2^{5x+6}

Exercise #13

72x+1717x= 7^{2x+1}\cdot7^{-1}\cdot7^x=

Video Solution

Step-by-Step Solution

We use the power property to multiply terms with identical bases:

aman=am+n a^m\cdot a^n=a^{m+n} We apply the property to our expression:

72x+1717x=72x+1+(1)+x=72x+11+x 7^{2x+1}\cdot7^{-1}\cdot7^x=7^{2x+1+(-1)+x}=7^{2x+1-1+x} We simplify the expression we got in the last step:

72x+11+x=73x 7^{2x+1-1+x}=7^{3x} When we add similar terms in the exponent.

Therefore, the correct answer is option d.

Answer

73x 7^{3x}

Exercise #14

Expand the following equation:

4a+b+c= 4^{a+b+c}=

Video Solution

Step-by-Step Solution

To solve this problem, we will use the rule of exponents that allows us to expand the sum a+b+c a + b + c in the exponent:

  • Given: 4a+b+c 4^{a+b+c}
  • According to the exponent rule xm+n+p=xm×xn×xp x^{m+n+p} = x^m \times x^n \times x^p , we can express:
  • Step: Break down 4a+b+c 4^{a+b+c} to:
  • 4a×4b×4c 4^a \times 4^b \times 4^c

Therefore, the expanded form of the equation is 4a×4b×4c 4^a \times 4^b \times 4^c .

Answer

4a×4b×4c 4^a\times4^b\times4^c

Exercise #15

Expand the following equation:

32a+x+a= 3^{2a+x+a}=

Video Solution

Step-by-Step Solution

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

  • Step 1: Analyze the given expression's exponent.
  • Step 2: Apply the exponent addition rule to expand the expression.
  • Step 3: Identify the correct choice from a set of given options.

Now, let's work through each step:
Step 1: The expression given is 32a+x+a 3^{2a + x + a} . Here the exponent is 2a+x+a 2a + x + a .
Step 2: We apply the rule bm+n=bm×bn b^{m+n} = b^m \times b^n by rewriting the exponent sum as individual terms: (2a) (2a) , x x , and a a .
Thus, we can rewrite the expression using the property of exponents: 32a+x+a=32a×3x×3a 3^{2a + x + a} = 3^{2a} \times 3^x \times 3^a .
Step 3: Upon expanding, the solution corresponds to option :

32a×3x×3a 3^{2a}\times3^x\times3^a

.

Therefore, the expanded expression is 32a×3x×3a 3^{2a}\times3^x\times3^a .

Answer

32a×3x×3a 3^{2a}\times3^x\times3^a

Exercise #16

Expand the following equation:

22a+a= 2^{2a+a}=

Video Solution

Step-by-Step Solution

To solve the problem, we can follow these steps:

  • Step 1: Recognize that the given expression is 22a+a 2^{2a+a} .
  • Step 2: Use the Power of a Power Rule for exponents, which allows us to write am+n=am×an a^{m+n} = a^m \times a^n .
  • Step 3: Rewrite the expression as follows:

Given: 22a+a 2^{2a+a}

Step 4: Simplify the exponent by splitting it:

Since the expression in the exponent is 2a+a 2a+a , we can write:

22a+a=22a×2a 2^{2a+a} = 2^{2a} \times 2^a

Thus, applying the properties of exponents correctly leads us to the expanded form.

Therefore, the expanded equation is 22a×2a 2^{2a} \times 2^a .

Answer

22a×2a 2^{2a}\times2^a

Exercise #17

Reduce the following equation:

a3x×ab×ab= a^{-3x}\times a^b\times a^b=

Video Solution

Step-by-Step Solution

To reduce the given equation a3x×ab×ab a^{-3x} \times a^b \times a^b , we will use the multiplication of powers rule for exponents, which states that if you multiply powers with the same base, you add the exponents.

Let's follow the steps:

  • Step 1: Identify that all terms share the same base, a a .

  • Step 2: Apply the rule: a3x×ab×ab=a3x+b+b a^{-3x} \times a^b \times a^b = a^{-3x + b + b} .

  • Step 3: Simplify the exponents by adding them: 3x+b+b=3x+2b -3x + b + b = -3x + 2b .

Therefore, the reduced form of the equation is a3x+2b a^{-3x + 2b} .

Answer

a3x+2b a^{-3x+2b}

Exercise #18

Reduce the following equation:

5a×52a×53a= 5^a\times5^{2a}\times5^{3a}=

Video Solution

Answer

5a+2a+3a 5^{a+2a+3a}

Exercise #19

Expand the following equation:

g10a+5x= g^{10a+5x}=

Video Solution

Answer

g5a+5x×g5a g^{5a+5x}\times g^{5a}

Exercise #20

Expand the following equation:

72x+7= 7^{2x+7}=

Video Solution

Answer

7x×7x+7 7^x\times7^{x+7}