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Integration Question help

[Deleted User] · 2008-10-28 16:34:19

It's probably very simple, but I just can't seem to get the right answer. If anybody could help me out it'd be much appreciated, thanks. I'm not sure how to go about writing this, but here it goes: Integral (limits are ln4 and 0) e^x(e^x +1)/(e^x -1) dx And the +1 and -1 are seperate from the power. Thanks!

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28-10-2008 5:34pm

#1

[Deleted User]
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It's probably very simple, but I just can't seem to get the right answer. If anybody could help me out it'd be much appreciated, thanks.

I'm not sure how to go about writing this, but here it goes:

Integral (limits are ln4 and 0) e^x(e^x +1)/(e^x -1) dx

And the +1 and -1 are seperate from the power.

Thanks!

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#2 28-10-2008 5:50pm
Cokehead Mother

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If you let u = e^x - 1, then e^x + 1 = u + 2

That help?

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#3 28-10-2008 5:57pm
[Deleted User]
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Cokehead Mother wrote: »

If you let u = e^x - 1, then e^x + 1 = u + 2

That help?

Ah I get you, yah that helps! didn't spot that, thanks a million!

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