Question

Mengenai log dan f(x)

Answer 1

• f(x) = (logx-1)/(logx+1)
• f(2a) = (log2a -1)/(log2a+1)

misalkan log 2a = x
» (x-1)/(x+1) = 1/2
» 2(x-1) = x+1
» 2x -2 = x +1
» 2x -x = 1 +2
» x = 3

x = log 2a
maka nilai log 2a adalah " 3 " #C