nilai k yang memenuhi penyelesaian 2^kx 4^k x 8^k+4=1

2^k . 4^k . 8^(k + 4) = 1
2^k . 2^2k . 2^3(k + 4) = 2^0
2^(k + 2k + 3(k + 4)) = 2^0
2^(3k + 3k + 12) = 2^0
2^(6k + 12) = 2^0
6k + 12 = 0
6k = -12
k = -2