A Level

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

f(x)=\frac{x}{\sqrt{1+x^2}}

, then

(f\circ f\circ f)(x)=

(a)

\frac{3x}{\sqrt{1+x^2}}

(b)

\frac{x}{\sqrt{1+3x^2}}

(c)

\frac{3x}{\sqrt{1+x^2}}

(d) None of these