fungsi invers dari f(x)=3x+4_____2x-1

jawab

f(x) = (3x + 4)/(2x -1)

y = (3x + 4)/(x - 1)

3x + 4 = y(x  -1)
3x + 4 = xy - y
2x - xy = -y - 4
x(2 - y) = (-y - 4)
x = (-y - 4)/( -y+ 2)

f⁻(x) = (x + 4)/(x - 2)