Question

$( \sqrt[5]{4} ) {}^{x } = \frac{1}{ \sqrt{8} }$
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Answer 1

5^√4^x = 1/√8

4^(x/5) = (√8)^-1

2^(2x/5) = (√2³)-¹

2^(2x/5) = 2^(-3/2) => 2 morreu

2x.........-3
----- = ------- (mult. cruzado)
5............2

2x•2 = 5•(-3)

4x = -15

x = -15/4 ✓