....function is horizontal.

x cubed - 12x + 2

wouldn't that be 0 and 2. by taking the derivative and solving for x, i get only 2, how do i find the other number(s)?

- September 3rd 2008, 09:53 PMplstevensFind all the values of x (if any) where the tangent line to the graph of the....
....function is horizontal.

x cubed - 12x + 2

wouldn't that be 0 and 2. by taking the derivative and solving for x, i get only 2, how do i find the other number(s)? - September 3rd 2008, 09:56 PMChris L T521
- September 3rd 2008, 10:02 PM11rdc11
Hi to find a horizontal tangent line to a function you take the derivative and equal it to 0

and

Shoot to late again lol - September 3rd 2008, 10:03 PMplstevens
thanks

- September 3rd 2008, 10:14 PMplstevensFind the derivative
9x^7/5-5x^2+10^4

Now here i worked this out but the computer keep saying my answer of 63/5x^2/5-10x - September 3rd 2008, 10:14 PMplstevens
the computer keep saying its wrong, where did i possibly go wrong on this one

- September 3rd 2008, 10:46 PM11rdc11

Is this what it looks like?