For what values ofxdoes the graph of:

F(X) = X^3 + 3X^2 + X + 3have a horizontal tangent?

I don't know how to approach this but I got0as one of the values of X. I'm not really sure if there are other values.

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- Oct 17th 2007, 07:43 AMFalconPUNCH!Derivatives Problem
For what values of

**x**does the graph of:

**F(X) = X^3 + 3X^2 + X + 3**have a horizontal tangent?

I don't know how to approach this but I got**0**as one of the values of X. I'm not really sure if there are other values. - Oct 17th 2007, 07:52 AMtopsquark
- Oct 17th 2007, 06:33 PMFalconPUNCH!
- Oct 17th 2007, 06:36 PMJhevon
- Oct 17th 2007, 06:39 PMvesperka
If you have a graphing calculator like a TI-83 you can type in the equation for the derivative and then hit 2nd --> Calc to find the zeros. I'm guessing your teacher probably wants to see work and it doesn't hurt to practice by hand, but it's a good way to check your answers :)

- Oct 17th 2007, 07:04 PMqbkr21Re:
- Oct 18th 2007, 06:52 AMFalconPUNCH!