Algebra-1

Question Analysis
This question tests the understanding of even roots and negative exponents. The key concept is that even roots of negative numbers are undefined in the real number system.

Key Concept Explanation
In the real number system, even roots (such as square roots) are only defined for nonnegative bases. For a negative base and an even root, the expression is undefined.

Step-by-step Solution
1. Identify the base and the root: The base is -16, and the root is

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