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# how to integrate this? watch

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1. tried for ages, and get close, but not done it yet.
any ideas? its definate, from x=0, to x=1

integrate WRT x: x/(4(x^2)+5)^.5
best i got is using u=4x, then using a 2nd substitution where v=u/5^.5

cheers.
2. (Original post by Vote-For-Pedro)
tried for ages, and get close, but not done it yet.
any ideas? its definate, from x=0, to x=1

integrate WRT x: x/(4(x^2)+5)^.5
best i got is using u=4x, then using a 2nd substitution where v=u/5^.5

cheers.
try u=4x^2+5
3. (Original post by rbnphlp)
try u=4x^2+5

this is good or

u^2 = 4x^2 +5

or (not recommended .... but it'll work !!)

4x^2 + 4 = Sinh u !!

4. Then integrate with respect to U.
I think that's right. Don't get annoyed if it's totally wrong tho D:!
5. you are all genii, thanks alot!

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Updated: October 11, 2009
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