# What is the equation of the normal line of #f(x)=5x^4+3x^3+x^2-2x-4# at #x=1#?

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The equation of the normal line of f(x)=5x^4+3x^3+x^2-2x-4 at x=1 is y = -4x + 6.

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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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