Question

If (-3)n+1 × (-3)5 = (-3)-4 then the value of n is

Answer 1

soln:
-3n+(-15)=12
-3n=12+15
-3n=27
then,
n=-9

Answer 2

Hello,
we have:
(-3)n+1×-(3)5=(-3)-4;
-3n+1×(-15)=12;
-3n+(-15)=12;
-3n=12+15;
-3n=27;
3n=-27;
n=27/3=9

then n=-9.

bye :-)