tolong dibantu!! log x + log(x+1)=log2

Bab Logaritma
Matematika SMA Kelas X

log x + log (x + 1) = log 2
log (x . (x + 1)) = log 2
x² + x - 2 = 0
(x + 2) (x - 1) = 0
x + 2 = 0
x = - 2

atau

x - 1 = 0
x = 1

syarat:
log x
x > 0

maka, yang memenuhi x = 1

HP = { 1 }