- #1

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How do you do that? I think it's asking me at what point is x = 0, or undefined, right??

- Thread starter PrudensOptimus
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- #1

- 635

- 0

How do you do that? I think it's asking me at what point is x = 0, or undefined, right??

- #2

Hurkyl

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Hint:

What is the unique feature about the equation of a horizontal line?

How does that relate to tangent lines?

What is the unique feature about the equation of a horizontal line?

How does that relate to tangent lines?

Last edited:

- #3

mathman

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Horizontal tangent is where derivative=0, that is x=-2.