Answer
$F(x)=G(x)+C$, where $C \in \mathbb R$ constant.
Work Step by Step
The two antiderivatives $F$ and $G$ of $f$ can differ only by the integration constant $C$ such that:
$$F(x)=G(x)+C$$ where $C \in \mathbb R$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.