If [243^(9 + 18z)](81^-18z)[27^(15 - 9^z)] = 1, what is the value of z?
A) -27
B) -10
C) 0
D) 10
E) 27
A) -27
B) -10
C) 0
D) 10
E) 27
(a^m)^n = a^(mn)GmatKiss wrote:If [243^(9 + 18z)](81^-18z)[27^(15 - 9^z)] = 1, what is the value of z?
A) -27
B) -10
C) 0
D) 10
E) 27
using this if you bring all those bases into same base then you should be able to solve it.
should be 10
user123321
