exponent mystery

[nafiul9090]

if x is not equals to 0, what is the value of (x^m/x^n)^5

i) n-m=2
ii) x^2= 1/4

oa comes later

[killer1387]

if x is not equals to 0, what is the value of (x^m/x^n)^5

i) n-m=2
ii) x^2= 1/4

oa comes later

(x^m/x^n)^5

1) (x^(m-n))^5=(x^(-2))^5
Insufficient

2) insufficient

1& 2
sufficient

hence C