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Suppose that we’ve already established that the derivative of an odd function is even, and vice versa. (See Problem 2.30) Something similar can be proved for integration. However, the
following is not quite right. Let
be even, and
let
be its indefinite integral. Then by the
fundamental theorem of calculus,
is the derivative of
. Since we’ve already established that the derivative of an odd function is even, we conclude that
is odd. Find all errors in the proof.





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