If $f: R →R$ is defined by $f(x) = \sin x+x$, then $f(f(x))$ is:
Answer & explanation
Correct answer: option 3
$f(x) = \sin x+x$
$f(f(x)) =\sin(\sin x + x) + \sin x+x$ (replacing $x$ with $\sin x + x$)
If $f: R →R$ is defined by $f(x) = \sin x+x$, then $f(f(x))$ is:
Correct answer: option 3
$f(x) = \sin x+x$
$f(f(x)) =\sin(\sin x + x) + \sin x+x$ (replacing $x$ with $\sin x + x$)