Thursday

August 28, 2014

August 28, 2014

Posted by **Kay** on Tuesday, November 17, 2009 at 12:14am.

I took the second derivative of the function and got 120x(2x^2+3x-15). From that I set it to equal and tried finding x. One is obviously zero.

Then I tried using the quadratic formula to get the other two x's. I got [-3 + sqrt(129)]/4 and [-3 - sqrt(129)]/4

However I plugged the answer into my online homework site and it says that is incorrect. Can someone help?

- Math -
**Writeacher**, Tuesday, November 17, 2009 at 7:11amAssistance needed.

Please type your__subject__in the**School Subject**box. Any other words are likely to delay responses from a teacher who knows that subject well.

- Inflection points -
**bobpursley**, Tuesday, November 17, 2009 at 8:39amI agree with you.

- Inflection points -
**Kay**, Tuesday, November 17, 2009 at 9:55pmWriteacher, thanks for the tip...I was never really sure whether I was supposed to type my actual class subject or the subject material. If it's ok, I might submit this question again with a different school subject.

**Related Questions**

calculus - Consider the function f(x)=12x^5+30x^4–300x^3+2. f(x) has inflection ...

calculus - Consider the function f(x)=12x^5+30x^4–160x^3+5 . f(x) has inflection...

calculus - Find all relative extrema and points of inflection of the function: f...

Calculus - The number of people who donated to a certain organization between ...

Math URGENT REALLY FAST HELP - find the inflection points of the function: f9x)=...

calculus - Use a graph of f(x) = 3 e^{-8 x^2} to estimate the x-values of any ...

Calculus A - Find all relative extrema and points of inflection for the ...

inflection points - How can I find the number of points of inflection for a ...

cal - Sketch the graph and show all local extrema and inflection points. f(x)= 1...

Calculus - Suppose f is continuous on [0, 6] and satisfies the following x 0 3 5...