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Multiple Choice

A software developer is creating a validation script for a technical calculator to handle the negative exponent rule, which states that a−n=1ana^{-n} = \frac{1}{a^n} for any integer nn. To prevent a 'Division by Zero' error in the code, the developer must identify which value of the base 'aa' makes the expression undefined. According to the definition, for what value of 'aa' is the expression a−na^{-n} undefined?

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Updated 2026-09-17

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