Question

If (-3)n+1 × (-3)5 = (-3)-4 then the value of n is options are 10 , -10 , 11 , - 11

Answer 1

Hello Sis!

Given :-
(-3)n +1 × (-3)5 = (-3)-4

We have to obtain the value of n,
Let us solve step vise


(-3)n +1 × (-3)5 = (-3)-4
=> -3n +1×(-15) = -7
=> -3n -15 = -7
=> -3n = -7 +15
=> -3n = 8
=> n = -8/3.

Hence, none of your options seems correct. your answer is -8/3.

hope it helps