Q4Short answer
MATHEMATICS Solution Given that f (x) = 4x – 3 = y (say), then 4x = y + 3 y +3 ⇒ x= y +3 x+3 Hence f –1 (y) = ⇒ f –1 (x) = 4 4
MATHEMATICS Solution Given that f (x) = 4x – 3 = y (say), then 4x = y + 3 y +3 ⇒ x= y +3 x+3 Hence f –1 (y) = ⇒ f –1 (x) = 4 4