Jika f(x)= 1/4x-2, maka fungsi invers (1) adalah..

Misalkan f(x) = y
1/4 x – 2 = y
1/4x = y+2
x = 4y + 8
f^-1(y)=4y+8
f^-1(x) = 4x+8
f^-1(x) = 4.1 + 8 = 12

F(x) = 1/4x-2
y = 1/4x-2
4xy -2y = 1
4xy = 1+2y
x(4y) = 1+2y
x = 1+2y/4y
f^-1 = 1+2x/4x