Let $α, β a n d γ$ be three positive real numbers.
$L e t f (x) = α x^{5} + β x^{3} + γ x, x \in R a n d g : R \to R$ be such that $g (f (x)) = x f o r a l l x \in R .$
$I f a_{1}, a_{2}, a_{3}, . . . . . a_{n}$ be in arithmetic progression with mean zero, then the value of
$f (g (\frac{1}{n} \sum_{i = 1}^{n} f (a_{i})))$ is equal to:

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

$C o n s i d e r a c a s e w h e n α = β = 0 t h e n f (x) = γ x, a n d g (f (x)) = x \Rightarrow g (γ x) = x \Rightarrow g (x) = \frac{x}{γ} \frac{1}{n} \sum_{i = 1}^{n} f (a_{i}) \Rightarrow \frac{y}{n} (a_{1} + a_{2} + . . . . . + a_{n}) = 0 \Rightarrow f (g (0)) \Rightarrow f (0) \Rightarrow 0$