Math Problem Statement

Which statement is true about the value of the expression \( (5^{-1})^2 \)?

Solution

To solve the problem, we are analyzing the expression:

(51)2\left( 5^{-1} \right)^2

Step-by-step Solution:

  1. Simplify 515^{-1}: The negative exponent rule tells us: 51=15.5^{-1} = \frac{1}{5}. So, 515^{-1} equals 0.20.2 (since 1÷5=0.21 \div 5 = 0.2).

  2. Square 15\frac{1}{5}: Now we square 15\frac{1}{5}: (15)2=125.\left( \frac{1}{5} \right)^2 = \frac{1}{25}. In decimal form: 125=0.04.\frac{1}{25} = 0.04.

  3. Analyze the value 0.040.04:

    • 0.040.04 is positive.
    • 0.040.04 is greater than 0 but less than 1.

Correct Answer:

The statement that is true about the value of the expression is:

"It is between 0 and 1."


Do you want further clarification or additional examples? Let me know!

Here are 5 related questions to expand on this concept:

  1. What happens to a negative exponent when it is squared?
  2. What is the value of (31)2(3^{-1})^2?
  3. How does the negative exponent rule work for fractions?
  4. What is the result of (22)2(2^{-2})^2?
  5. How do we determine if a value is between -1 and 0?

Tip: A negative exponent means you are taking the reciprocal of the base, and squaring a small fraction always results in an even smaller positive value.

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Math Problem Analysis

Mathematical Concepts

Exponents
Negative Exponents
Simplification of Expressions
Squaring Fractions

Formulas

a^{-n} = 1 / a^n
\left(\frac{1}{a}\right)^2 = \frac{1}{a^2}

Theorems

Negative Exponent Rule
Laws of Exponents

Suitable Grade Level

Grades 6-8