Question

(- 8)^7/5 x (- 8)^-4/5 x (- 8)^-3/5 = .....................

A) 0 

B) – 8 

C) 1 

D) – 512

Answer 1

Correct option is (C) 1

\((-8)^\frac75\times(-8)^\frac{-4}5\times(-8)^{\frac{-3}5}\) \(=(-8)^{\frac75+(\frac{-4}5)+(\frac{-3}5)}\)

\(=(-8)^{\frac75-\frac75}\) \(=(-8)^0=1\)

Answer 2

Correct option is  C) 1