For each of the following functions, find a function $F(x)$ that has $f(x)$ as its derivative, that is $F^{\prime] (x)=f(x) $ (Note that you are not asked to find $f^{\prime} (x) $ ) (a) $f(x)=x^{2}$ (b) $f(x)=2 x+3$ (c) $f(x)=x^{a} $ $(a eq-1)$ S.P.PB. 354