Question

What it says is: Determine the x-coordinates of the points of inflection for the graph of f(x). so I took the derivative of f(x)=9e and I got 0, how am I supposed to get a point of inflection from this?

Answer 1

wait, i forgot to say something, I know that the point of inflection is the derivative of the function twice, and that is what 9e is, I had already taken the derivative once. :)

Answer 2

For inflection points you want to see when the curvature changes. That means that the second derivative changes sign.

Answer 3

Yep, but there is no x to set equal to x, sooo what do I do?

Answer 4

x=0, sorry typoo

Answer 5

What was the original function

Answer 6

f(x)=3xe^(-x^2)

Answer 7

And you got 9e when you took the derivative?

Answer 8

Yep

Answer 9

That's unpossible

Answer 10

omg. omg. I realized what i did wrong. thank you

Answer 11

the i plugged in 1 for x for some odd, odd, odd reason.

Answer 12

If the derivative were 9e, then I should be able to integrate 9e and get back to the original function plus a constant. But the integral of 9e is 9ex

Answer 13

which is not the function

Answer 14

lol exactly. :) ha thank you!

Answer 15

=)