Write each expression without negative exponents, and evaluate if possible. Assume all variables represent nonzero real numbers. (-4)^-3

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

Apply this rule to the expression \((-4)^{-3}\). Rewrite it as \(\frac{1}{(-4)^3}\) to eliminate the negative exponent.

Calculate the denominator \((-4)^3\) by multiplying \(-4\) by itself three times: \((-4) \times (-4) \times (-4)\).

Evaluate the multiplication step-by-step: first \((-4) \times (-4)\), then multiply the result by \(-4\) again.

Write the final expression as \(\frac{1}{\text{the value you found}}\). This is the expression without negative exponents and evaluated.

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주요 개념

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Negative Exponents

A negative exponent indicates the reciprocal of the base raised to the corresponding positive exponent. For example, a^-n = 1/a^n, where a ≠ 0. This rule allows rewriting expressions without negative exponents by moving the base to the denominator.

Evaluating Powers of Negative Numbers

When raising a negative number to a power, consider whether the exponent is even or odd. An odd exponent preserves the negative sign, while an even exponent results in a positive value. For example, (-4)^3 = -64 because 3 is odd.

Simplifying Expressions with Exponents

Simplifying expressions involves applying exponent rules systematically, such as converting negative exponents to positive, and then calculating numerical values when possible. This process ensures expressions are in standard form and easier to interpret.

Write each expression without negative exponents, and evaluate if possible. Assume all variables represent nonzero real numbers. (-4)-3