Question

Tentukan nilai x yg memenuhi: a.log (x+1)-log (x-1)=1

Answer 1

Verified answer

Log (x+1)-log (x-1)=1

Log10 = 1

log (x+1)-log (x-1)=log 10
Log (x+1) / (x-1) = log 10
(x+1)/(x-1) = 10
x+1 =10 (x-1)
x+1 =10x-10
1+10 = 10x-x
11 = 9x
11/9 =x
1 2/9 ( dibaca satu, dua per sembilan