Examples with solutions for Powers: Identify the greater value

Exercise #1

Which expression is of greater value:

Video Solution

Step-by-Step Solution

Let's solve the problem by evaluating each expression:

  • Calculate 24 2^4 :
    24=2×2×2×2=16 2^4 = 2 \times 2 \times 2 \times 2 = 16 .
  • Calculate 37 3^7 :
    37=3×3×3×3×3×3×3=2187 3^7 = 3 \times 3 \times 3 \times 3 \times 3 \times 3 \times 3 = 2187 .
  • Calculate 102 10^2 :
    102=10×10=100 10^2 = 10 \times 10 = 100 .
  • Calculate 55 5^5 :
    55=5×5×5×5×5=3125 5^5 = 5 \times 5 \times 5 \times 5 \times 5 = 3125 .

Now, let's compare the computed values: 16 16 (for 24 2^4 ), 2187 2187 (for 37 3^7 ), 100 100 (for 102 10^2 ), and 3125 3125 (for 55 5^5 ).

Clearly, the value 3125 3125 is the largest among the values we've calculated.

Therefore, the expression with the greatest value is 55 5^5 .

Answer

55 5^5

Exercise #2

Which of the expressions below has the highest value?

74,83,102,1112 7^4,8^3,10^2,11^{\frac{1}{2}}

Video Solution

Step-by-Step Solution

The goal is to compare the values of the expressions 74 7^4 , 83 8^3 , 102 10^2 , and 1112 11^{\frac{1}{2}} to identify the one with the highest value.

Let's calculate each expression:

  • Calculate 74 7^4 :
    - 74=7×7×7×7 7^4 = 7 \times 7 \times 7 \times 7
    - 7×7=49 7 \times 7 = 49
    - 49×7=343 49 \times 7 = 343
    - 343×7=2401 343 \times 7 = 2401
    Therefore, 74=2401 7^4 = 2401 .
  • Calculate 83 8^3 :
    - 83=8×8×8 8^3 = 8 \times 8 \times 8
    - 8×8=64 8 \times 8 = 64
    - 64×8=512 64 \times 8 = 512
    Therefore, 83=512 8^3 = 512 .
  • Calculate 102 10^2 :
    - 102=10×10=100 10^2 = 10 \times 10 = 100 .
    Therefore, 102=100 10^2 = 100 .
  • Calculate 1112 11^{\frac{1}{2}} (the square root of 11):
    - 1112113.3166 11^{\frac{1}{2}} \approx \sqrt{11} \approx 3.3166 .
    Therefore, 11123.3166 11^{\frac{1}{2}} \approx 3.3166 .

Now, let's compare these values:

  • 74=2401 7^4 = 2401
  • 83=512 8^3 = 512
  • 102=100 10^2 = 100
  • 11123.3166 11^{\frac{1}{2}} \approx 3.3166

Clearly, 2401 2401 is the highest value among these, which is obtained from 74 7^4 .

Therefore, the expression with the highest value is 74 7^4 .

Answer

74 7^4

Exercise #3

Which is larger?

61 ——16 6^1\text{ }_{——}1^6

Video Solution

Step-by-Step Solution

To solve this problem, we'll compare the two expressions 616^1 and 161^6 by computing each power:

  • Step 1: Calculate 616^1.
  • Since the exponent is 1, 61=66^1 = 6.
  • Step 2: Calculate 161^6.
  • Any number raised to a power of 6 is multiplied by itself six times. Here, 16=1×1×1×1×1×1=11^6 = 1 \times 1 \times 1 \times 1 \times 1 \times 1 = 1.
  • Step 3: Compare the results.
  • 61=66^1 = 6 and 16=11^6 = 1.

Since 6>16 > 1, we conclude that 616^1 is larger than 161^6.

Therefore, the answer is >>.

Answer

>

Exercise #4

Which is larger?

52 ——25 5^2\text{ }_{——}2^5

Video Solution

Step-by-Step Solution

To solve this problem, we will follow these steps:

  • Step 1: Calculate 525^2.
  • Step 2: Calculate 252^5.
  • Step 3: Compare the results to determine which is larger.

Let's work through each step:
Step 1: Calculate 525^2.
52=5×5=255^2 = 5 \times 5 = 25.

Step 2: Calculate 252^5.
25=2×2×2×2×2=322^5 = 2 \times 2 \times 2 \times 2 \times 2 = 32.

Step 3: Compare the results.
We have 52=255^2 = 25 and 25=322^5 = 32. Clearly, 25<3225 < 32.

Therefore, 52 ——255^2 \text{ }_{——} 2^5 is < .

Answer

<

Exercise #5

Which is larger?

0100 ——1000 0^{100}\text{ }_{——}100^0

Video Solution

Step-by-Step Solution

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

  • Step 1: Evaluate 0100 0^{100} .
  • Step 2: Evaluate 1000 100^0 .
  • Step 3: Compare the values obtained in Step 1 and Step 2.

Now, let's work through each step:

Step 1: Evaluate 0100 0^{100} .
Any non-negative integer power of 0 evaluates to 0. Therefore, 0100=0 0^{100} = 0 .

Step 2: Evaluate 1000 100^0 .
By the zero exponent rule for non-zero bases, 1000=1 100^0 = 1 .

Step 3: Compare the values obtained: 0 0 and 1 1 .
Clearly, 0<1 0 < 1 .

Therefore, 0100 0^{100} is less than 1000 100^0 .

The correct choice is: <

Answer

<

Exercise #6

Which of the expressions below has the highest value?

Video Solution

Step-by-Step Solution

To solve this problem, we shall compute the value of each expression:

  • First, calculate 124 12^4 :
    124=12×12×12×12=20736 12^4 = 12 \times 12 \times 12 \times 12 = 20736 .
  • Next, calculate 94 9^4 :
    94=9×9×9×9=6561 9^4 = 9 \times 9 \times 9 \times 9 = 6561 .
  • Then, calculate 56 5^6 :
    56=5×5×5×5×5×5=15625 5^6 = 5 \times 5 \times 5 \times 5 \times 5 \times 5 = 15625 .
  • Finally, calculate 35 3^5 :
    35=3×3×3×3×3=243 3^5 = 3 \times 3 \times 3 \times 3 \times 3 = 243 .

After computing the values, we compare them:

  • 124=20736 12^4 = 20736
  • 94=6561 9^4 = 6561
  • 56=15625 5^6 = 15625
  • 35=243 3^5 = 243

Among these, the highest value is 20736 20736 , which corresponds to 124 12^4 .

Therefore, the expression with the highest value is 124 12^4 .

Answer

124 12^4

Exercise #7

Which is larger?

(12)5 ——(0.5)5 (\frac{1}{2})^5\text{ }_{——}(0.5)^5

Video Solution

Step-by-Step Solution

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

  • Step 1: Recognize that 12\frac{1}{2} is equivalent to 0.50.5.

  • Step 2: Evaluate both expressions using this equivalence.

  • Step 3: Conclude based on the equality of the expressions.

Now, let's work through each step:
Step 1: It's important to understand the equivalence between 12\frac{1}{2} and 0.50.5. As a fraction, 12\frac{1}{2} is equal to the decimal 0.50.5.
Step 2: We apply the power to each base: (12)5(\frac{1}{2})^5 and (0.5)5(0.5)^5. Due to their equivalence, (12)5(\frac{1}{2})^5 is necessarily equal to (0.5)5(0.5)^5.
Step 3: Since both expressions compute to the same value because their bases are identical (12=0.5\frac{1}{2} = 0.5), the two expressions are equal.

Therefore, the solution to the problem is= = .

Answer

= =

Exercise #8

Which is larger?

24 ——42 2^4\text{ }_{——}4^2

Video Solution

Step-by-Step Solution

To solve this problem, we will calculate 242^4 and 424^2 and then compare the results:

  • Step 1: Calculate 242^4
    242^4 means multiplying 2 by itself 4 times: 2×2×2×2=162 \times 2 \times 2 \times 2 = 16.
  • Step 2: Calculate 424^2
    424^2 means multiplying 4 by itself 2 times: 4×4=164 \times 4 = 16.
  • Step 3: Compare the results
    Since both calculations result in 16, we have 24=422^4 = 4^2.

Therefore, the correct comparison is that 242^4 is equal to 424^2. The answer to the problem is = = .

Answer

= =

Exercise #9

Which is larger?

72 ——73 7^2\text{ }_{——}7^3

Video Solution

Step-by-Step Solution

Let's solve the problem by calculating each value:

Step 1: Calculate 72 7^2 .
72=7×7=49 7^2 = 7 \times 7 = 49 .

Step 2: Calculate 73 7^3 .
73=7×7×7=343 7^3 = 7 \times 7 \times 7 = 343 .

Step 3: Compare 49 49 and 343 343 .
We can clearly see that 49 49 is less than 343 343 .

Therefore, we have 72<73 7^2 < 7^3 .

The correct comparison sign is < < .

Thus, choice 1 is correct: < < .

Answer

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Exercise #10

Which is larger?

(310)7 ——(0.3)8 (\frac{3}{10})^7\text{ }_{——}(0.3)^8

Video Solution

Step-by-Step Solution

To determine which of the two expressions is larger, we need to evaluate them using a comparability method:

  • Step 1: Observe that these are powers of a common base. We first convert (0.3)8 (0.3)^8 to a fraction form. The number 0.3 0.3 is equivalent to 310 \frac{3}{10} .
  • Step 2: Thus, (0.3)8 (0.3)^8 becomes (310)8 \left(\frac{3}{10}\right)^8 .
  • Step 3: We then compare (310)7 \left(\frac{3}{10}\right)^7 and (310)8 \left(\frac{3}{10}\right)^8 . Since both have the same base, 310 \frac{3}{10} , we compare the exponents directly: 7 7 and 8 8 .
  • Step 4: Clearly, any number to the power of 7 will be larger than the same number to the power of 8, since raising a positive fraction to a higher power results in a smaller number.

This analysis shows that (310)7 \left(\frac{3}{10}\right)^7 is larger than (0.3)8 (0.3)^8 . Therefore, using the symbol for comparison:

The correct comparison is (\frac{3}{10})^7 > (0.3)^8 .

Accordingly, the solution to this problem as stated is incorrect in the given answer. The correct comparison should indeed be:

(310)7>(0.3)8 (\frac{3}{10})^7 > (0.3)^8

Answer

<

Exercise #11

Which is larger?

168 ——16(2+6) 16^8\text{ }_{——}16^{(2+6)}

Video Solution

Step-by-Step Solution

The problem involves comparing 168 16^8 and 16(2+6) 16^{(2+6)} .

First, simplify the exponent in the second expression:

  • 16(2+6)=168 16^{(2+6)} = 16^8

This simplifies directly to 168 16^8 , which is identical to the first expression, 168 16^8 .

Since both expressions are equal after simplification, we conclude that:

The two expressions are equal, therefore = = .

Answer

= =

Exercise #12

Which of the expressions has the highest value?

Video Solution

Answer

65 6^5

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