Change of Variable in Limits

Rarely Tested

Change of Variable in Limits

If:

$$t=g(x)$$

and:

$$x\to a\Rightarrow t\to L$$

then:

$$\lim_{x\to a}f(g(x))=\lim_{t\to L}f(t)$$

Usage

- Used to transform complicated limits into standard forms.

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