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The n-th root of a, written ⁿ√a, can be expressed as:
Aa^n
Ba^(1/n)
Cn / a
Dn × a
Answer & Solution
Correct answer: B. a^(1/n)
1. By definition, if x^n = a then x = ⁿ√a.
2. This equals a^(1/n) by the fractional-exponent rule.
3. Example: ⁴√16 = 2 because 2^4 = 16, and 16^(1/4) = 2.
_Source: ICMAI BoS CMA Foundation Paper 3 (Business Mathematics & Statistics), Module 2 §2.2 (Indices and Logarithms) + Module 5 (Standard Deviation), p. 112-160 + 318-340_