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Question: If f(x) = <img src="https://cdn.pureessence.tech/canvas_532.png?top_left_x=1811&top_left_y=900&width...

If f(x) = then f(f(x)) is

A

x ∀ x ∈ R

B

−x ∀ x ∈ R

C

x2 ∀x∈ R

D

f(x) ∀ x ∈ R

Answer

f(x) ∀ x ∈ R

Explanation

Solution

f(f(x)) =

But f(x) is > 0 ∀ x ∈ R. Thus

f(f(x)) =