Jawabanmu

2014-08-25T12:41:12+07:00
E. 2.4^x - 5.2^x + 2 = 0
2.2^2x - 5.2^x + 2 = 0
misal : p = 2^x
2.p^2 - 5p + 2 = 0
(2p - 1)(p-2)=0
p = 1/2 atau p =2
jika p=1/2 maka x=-1
jika p=2 maka x=1