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Q. Let $f(x)=x^{3}$ and $g(x) = x^{2} + 1$ be two real functions. Then $(f+g) (x)=$

Relations and Functions

Solution:

$\left(f+g\right)\left(x\right)=f\left(x\right)+g\left(x\right)$
$=x^{3}+x^{2}+1$