Algebra-2

Question Analysis
This problem evaluates the understanding of the principal nth root, specifically for odd roots.

Key Concept Explanation
The principal nth root of a number is the unique real root when is odd. For odd roots, any real number has exactly one real root.

Step-by-step Solution
1. Identify the number and the root: We need to find the principal fifth root of 243.
2. Determine the value: Since

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