2u integration question (1 Viewer)

Eddykungfu · Apr 30, 2009

hey, I got this in my paper, forgot how todo it/dno how

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can anyone help?

(I can't do that S symbol here so Ill just say integrate)

Integrate: x . e^(x^2)

If that makes any sense?

so x multiplied by e^(x^2)

illiterary · Apr 30, 2009

Eddykungfu · Apr 30, 2009

isn't that differentiating?

The question was integration.

Thanks for the fast reply tho

Drongoski · Apr 30, 2009

Eddykungfu · Apr 30, 2009

Drongoski said:
$\100dpi Let\ u\ =\ x^{2}\\ \\ \therefore \ \ \frac{\mathrm{d} u}{\mathrm{d} x}\ =\ 2x\ \ so\ that\ 2xdx\ =\ du\\ \\ \therefore \int \ x\cdot e^{x^{2}}\ dx\ \ =\ \ \int e^{x^{2}}\cdot xdx\ \ =\ \ \frac{1}{2} \int e^{u}du\ \ =\ \ \frac{1}{2}e^{u}\ +\ C\\ \\ \ \ \ =\ \ \frac{1}{2}e^{x^{2}}\ +\ C$

Thanks heaps mate

.

Yeah, that was worth 3 marks.

I got the final answer (some how)

Does that mean i get 1 mark?

2u integration question (1 Viewer)

Eddykungfu

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illiterary

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Eddykungfu

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Drongoski

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Eddykungfu

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