Question

Jika f(1/x-1) = x-6/x+3, maka nilai f invers (-2) adalah ?

Answer 1

f(1/x-1) = x-6/x+3
ambil x = 0 maka
f(1/-1) = -6/3
f(-1) = -2
Ingat:
jika f(a) = b maka f invers (b) = a
artinya 
jika f(-1) = -2 maka f invers (-2) = -1