Q. Let $f:R \rightarrow R:f(x) = x^{2}$ and $g:R \rightarrow R:g(x) = x + 5$, then $gof$ is
A) $(x + 5)$
B) $(x + 5^{2})$
C) $(x^{2} + 5^{2})$
D) $(x^{2} + 5)$
Explanation
(d)
$gof = g\left\{ f(x) \right\} = g\left( x^{2} \right) = x^{2} + 5$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.