Question

Nilai x yang memenuhi 3(log x)^2 - log x^5 = 2 adalah

Answer 1

Misal log x = a
3a2-5a = 2
3a2-5a-2=0
(3a+1)(a-2)=0
a = -1/3 V a = 2
log x = -1/3           log x = 2 
x = 1 / 3 akar 10         x = 100