Question

If f : R → R be a mapping defined by f (x) = x³ + 5, then
f⁻¹(x) is equal to
(a) (x + 5)¹/³ (b) (x - 5)¹/³ (c) (5 - x)¹/³ (d) 5 - x

Answer 1

Answer:

b is the correct answer

Step-by-step explanation:

let y denote f(x).

y = x³ + 5

y - 5 = x³

x = (y - 5)¹/³

therefore f⁻¹(x) = (x - 5)¹/³

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