Answer
$p(x)=C$
Work Step by Step
The kernel of a linear map $T : A → B$, is the set of all elements $v$ in $A$ for which $T(v) = 0$, where $0$ is the zero vector in B.
Hence, here we need $p'=0$; thus $p=\int 0 dp=C$, where C is a constant.
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