Hi, my question is:

The function F(x) satisfies F'(x)=e^(-x^2) and F(0)=0. Express F(x) as a definite integral.

I'm really stuck on this question, so any help and hints would be greatly appreciated! :)

Printable View

- November 3rd 2013, 10:06 AMsakuraxkisuExpress F(x) as a definite integral
Hi, my question is:

The function F(x) satisfies F'(x)=e^(-x^2) and F(0)=0. Express F(x) as a definite integral.

I'm really stuck on this question, so any help and hints would be greatly appreciated! :) - November 3rd 2013, 10:19 AMPlatoRe: Express F(x) as a definite integral
- November 3rd 2013, 10:36 AMsakuraxkisuRe: Express F(x) as a definite integral
What confused me about this question is that, when I try to compute the integral, I get:

F(x)= [-e^(-t^2)/2t] upper limit x and lower limit 0

When I put in the limits, I get the definite integral being:

(-e^(x^2)/2x)-(-e^(0)/0)=(-e^(x^2)/2x)-(-1/0)

What confuses me is the second part of this definite integral, as it is divided by zero and can't be computed. For this reason I'm stuck on this question. Is there some other method, or is this the correct way to approach this question? Thank you - November 3rd 2013, 10:52 AMPlatoRe: Express F(x) as a definite integral
- November 3rd 2013, 11:00 AMsakuraxkisuRe: Express F(x) as a definite integral
So for this question, am I right in saying that I need to state what the definite integral is (ie the integral you gave), but I don't actually have to compute it? Thank you :)

- November 3rd 2013, 11:04 AMPlatoRe: Express F(x) as a definite integral
- November 3rd 2013, 11:08 AMsakuraxkisuRe: Express F(x) as a definite integral
Thank you for your help! :)