Question

nomor 14, 15, 17 dong..
dengan caranya pliss...

Answer 1

14) 4^(x-1) - 18.2^(x-2) + 8 = 0
2^2(x-1) - 9.2^(x-1) + 8 = 0

misal : a = 2^(x-1)

a² - 9a + 8 = 0
(a-1)(a-8) = 0
a = 1
2^(x-1) = 1 = 2^0
x = 1

a = 8
2^(x-1) = 8 = 2³
x = 4

HP = { 1 , 4 }