Jawabanmu

2014-02-11T21:53:09+07:00
Jika soalnya 3^log (x-1) + 3^log (x+1) < 2 maka 3^log (x-1)(x+1)<2 3^log (x^2 - 1) < 2 3^log (x^2 - 1) < 3^log 3^2 (x^2 - 1) < 3^2 x^2 - 1 < 9 x^2 < 8 x< √8