Cara penyelesaiannya

fungsi invers

f(x) = -2x+5/4x-5
f^-1(x) = -dx + b/cx-a
f^-1(x) = -(-5)x + 5/4x -(-2x)
= 5x+5/4x+2x

f^-1(2) = 5(2)+5/4(2)+2(2)
= 10+5/8+4
= 15/12