nilai x yang memenuhi 9^x-1=1/3^4×

9^(x - 1) = (1/3)^4x
3^2(x - 1) = 3^-4x
2(x - 1) = -4x
2x + 4x - 2 = 0
6x = 2
x = 2/6
x = 1/3

Nilai x yg memenuhi :
x = 1/3