# Does #int fg = int f int g# ?

Proof by contradiction

This is an interesting question, but can be simply prooved via contradiction:

This is the statement we are trying to disprove:

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See explanation...

There are some functions for which:

For example:

Then:

So:

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If at least one of

To show that the equality does not hold universally, it suffices to provide a counterexample.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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