If A ( \\ displaystyle A ) has an antiderivative , let Q ( \\ displaystyle Q ) be an antiderivative of A ( \\ displaystyle A ) .
This Q ( \\ displaystyle Q ) satisfies the condition for exactness .
If A ( \\ displaystyle A ) has an antiderivative , let Q ( \\ displaystyle Q ) be an antiderivative of A ( \\ displaystyle A ) and this Q ( \\ displaystyle Q ) satisfies the condition for exactness .