Difficulty: Easy
Correct Answer: ∛8
Explanation:
Introduction / Context:
Comparing different radicals often reduces to evaluating known perfect powers or estimating via basic properties.
Given Data / Assumptions:
Compare ∜10 and ∛8.
Concept / Approach:
8 is a perfect cube, so ∛8 = 2 exactly. Estimate ∜10 ≈ 10^(1/4).
Step-by-Step Solution:
∛8 = 2 (since 2^3 = 8).∜10 ≈ 10^0.25 ≈ 1.78 (since 1.78^4 ≈ 10).Therefore, 2 > 1.78, so ∛8 is greater.
Verification / Alternative check:
Quick reference: ∜16 = 2, and since 10 < 16, ∜10 < 2, confirming the comparison.
Why Other Options Are Wrong:
∜10 is smaller; they are not equal; “None of these” is inapplicable.
Common Pitfalls:
Confusing indices (3rd vs 4th roots) or assuming higher index always yields a larger value.
Final Answer:
∛8
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