Question

Let f : R → R be defined by f (x) = 3 x - 4. Then, f⁻¹ (x) is
(a) x +4/3 (b) x/3 - 4 (c) 3 x + 4 (d) none of these

Answer 1

Answer:

a is the correct option

Step-by-step explanation:

let y denote f(x)

Then,

y = 3x - 4

y + 4 = 3x

x = (y + 4)/3

therefore,  f⁻¹ (x) = (x + 4)/3.

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