JAMB - Mathematics (2002 - No. 19)
The inverse function f(x) = 3x + 4 is
(x-4)/3
(x-5)/5
(x+3)/4
(x+4)/3
คำอธิบาย
Let y = f(x).
\(y = 3x + 4 \implies x = \frac{y - 4}{3}\)
Replace y with x.
\(y = \frac{x - 4}{3} \)
Let y = f(x).
\(y = 3x + 4 \implies x = \frac{y - 4}{3}\)
Replace y with x.
\(y = \frac{x - 4}{3} \)