calculate $$\int {t^3e^{-t}}dt$$

Question

loser66 · Answer

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terenzreignz · Answer

By parts seems to be the way to go here...

loser66 · Answer

ok, I try to avoid it, but if there is no way to do. I will. thanks TJ

terenzreignz · Answer

I don't think there's any other way T.T

loser66 · Answer

Sorry, friend, I 'm lazy when taking int 3 times for this

anonymous · Answer

@terenzreignz I agree with you, using tabular integration would be ideal. Tabular integration is basically integration by parts except for a special case where one function in the integrand can be differentiated to 0 whereas the other can be perpetually integrated.

loser66 · Answer

@genius12 I know that method,(tabular), it's just a part in my differential equation, sigh!!! no choice for me

terenzreignz · Answer

Good luck :D

loser66 · Answer

Thanks TJ

loser66 · Answer

I have a bunch of homework, try to get a shortcut, hihi...

terenzreignz · Answer

The tabular method is a shortcut? LOL

loser66 · Answer

no, I know it's not, that's why I posted the question to get other's opinion. Who knows? what if I am lucky., right?

loser66 · Answer

What? I saw genius12 wrote something, why it disappears?

loser66 · Answer

Thanks friends.

anonymous · Answer

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@Loser66