Match each expression in Column I with its equivalent expression in Column II. Choices may be used once, more than once, or not at all.

검증된 단계별 안내

Step 1: Understand the meaning of negative exponents. Recall that for any nonzero number $a$ and positive integer $n$, $a^{-n} = \frac{1}{a^n}$. This means a negative exponent indicates the reciprocal of the base raised to the positive exponent.

Step 2: Evaluate each expression in Column I by applying the negative exponent rule and considering the sign carefully. For example, for $5^{-3}$, rewrite it as $\frac{1}{5^3}$.

Step 3: Calculate the value of \$5^3$ which is $5 \times 5 \times 5$. This will help you express $5^{-3}$ as a fraction.

Step 4: For expressions with a negative sign outside the base, such as $-5^{-3}$, remember the negative sign applies after evaluating $5^{-3}$. For expressions like $(-5)^{-3}$, the negative sign is part of the base, so raise $-5$ to the power of $-3$.

Step 5: Match each simplified expression from Column I to the equivalent value in Column II by comparing their numerical values and signs.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Negative Exponents

A negative exponent indicates the reciprocal of the base raised to the corresponding positive exponent. For example, a⁻³ equals 1 divided by a³. This rule helps simplify expressions like 5⁻³ to 1/125.

Order of Operations and Sign Placement

Understanding how negative signs interact with exponents is crucial. For instance, -5⁻³ means the negative of 5⁻³, while (-5)⁻³ means the reciprocal of -5 cubed. Parentheses determine whether the negative sign is part of the base or applied afterward.

Evaluating Powers of Negative Numbers

Raising a negative number to an odd power results in a negative number, while an even power yields a positive number. For example, (-5)³ = -125, so (-5)⁻³ = 1/(-125) = -1/125. This concept helps match expressions with their correct values.