Question

Value of $7^{-1}+[-7] ^{2-1}$ is:
(A) 7
(B)1/
(C) 49
(D)8/49

Answer 1

None of this........

Answer 2

HELLO DEAR,

we know:- a-¹ = 1/a

so, 7-¹ + [-7]^(2 - 1)

=> 1/7 + (-7)¹

=> 1/7 - 7 = (1 - 49)/7

=> -48/7

I HOPE IT'S HELP YOU DEAR,

THANKS