Question

The value of the parameter a, for which the function f(x) = 1 + αx, α ≠ 0 is the inverse of itself, if 

(a) – 2 

(b) –1 

(c) 1 

(d) 2

Answer 1

Correct option (b) –1

Explanation:

Comparing the co-efficients, we get, 

α² = 1 and α = – 1 

⇒ α = –1