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What is the integral of e to the power of x squared, and why? Please help! Watch

2. http://lmgtfy.com/?q=what+is+the+int...of+e%5E(x%5E2)

Alternatively, put it into an integral calculator. You'll see that it's way beyond any a-level spec, so you don't need to know it.

You need some sort of kx before the e^(x^2) for it to form a standard integral. f'(x)e^f(x).
3. First you need to know erf function, and I suppose you won't ask this if you already know what erf is.

A substitution dx dy = r dr d(theta) might help
4. 1/2x e^x^2

Think of it this way;

What coefficient of e do I need to have so that when I derive it I get e^x^2 on it's own.
5. (Original post by calcumm)
1/2x e^x^2

Think of it this way;

What coefficient of e do I need to have so that when I derive it I get e^x^2 on it's own.
Is this some kind of joke?

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6. (Original post by calcumm)
1/2x e^x^2

Think of it this way;

What coefficient of e do I need to have so that when I derive it I get e^x^2 on it's own.
No, that is wrong.

If we use a substitution u=x^2 we get du=2x dx

So ∫ e^(x^2) dx = ∫ e^u 1/(2√u) du which isn't helpful.
7. (Original post by cogito.)
Is this some kind of joke?

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(Original post by Math12345)
No, that is wrong.

If we use a substitution u=x^2 we get du=2x dx

So ∫ e^(x^2) dx = ∫ e^u 1/(2√u) du which isn't helpful.

Oh my god, brb, dropping A level maths.
8. (Original post by calcumm)
Oh my god, brb, dropping A level maths.
Think you are confusing differentiation and integration. Integration is usually harder.

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