Question:
If $f(x)=x+1$, then write the value of
Solution:
$f(x)=x+1$
$\Rightarrow(fof)(x)=f(x)+1$
$=(x+1)+1$
$=x+2$
So, $\frac{\mathrm{d}}{\mathrm{dx}}($ fof $)(\mathrm{x})=\frac{\mathrm{d}}{\mathrm{dx}}(\mathrm{x}+2)$
$=1($ Ans $)$
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