# How do you find all critical point and determine the min, max and inflection given #D(r)=-r^2-2r+8#?

Critical points

Please observe that this is coherent, as the graph is a parabola pointing downwards, so it has a single maximum

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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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