Question

Write 5–√4 using rational exponents.
A. 5 ^1/4
B. 4 ^1/5
C. 5 ^4

D. 4 ^5

Answer 1

Interpret "5–√4" as the 5th root of 4 (usually written ⁵√4). The nth root a = a^(1/n), so

⁵√4 = 4^(1/5).

Answer: B.

(If it had meant "5 − √4" (five minus square root of 4), that would equal 5 − 2 = 3.)