# How do you find the domain and range of #f(x) = 1/(1+x^2)#?

The domain is

Consequently,

To find the range, follow these steps:

Consequently,

graph{1/(1+x^2) [-5.625, 5.625, -11.25, 11.25]}

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**Domain:** All real numbers.

**Range:** ( (0, 1] ).

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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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