# What is the equation of the normal line of #f(x)=(x-3)/(x+4)# at #x=-1#?

Using the point gradient formula,

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The equation of the normal line of f(x)=(x-3)/(x+4) at x=-1 is y = -5x - 2.

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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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