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jennychan12Best ResponseYou've already chosen the best response.0
\[\sqrt[3]{x^2+4x}\]
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
i know that u = x^2+4x so du = (2x+4)dx where do i go from there?
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
@agent0smith @Dido525
 one year ago

AtiFSBest ResponseYou've already chosen the best response.0
well u multipl that by 1/3 too
 one year ago

AtiFSBest ResponseYou've already chosen the best response.0
1/3 dx (x^2 + 4x) = 1/3* (2x + 4)..I think so
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
how did you get that? can u explain?
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
cuz du = (2x+4)dx = (2(x+2))dx so 1/2du = (x+2)dx then...?
 one year ago

AtiFSBest ResponseYou've already chosen the best response.0
actually, the value of power multplies..hmm du = 1/3*(2x + 4)dx => 3*du = (2x + 4)dx
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
I'm pretty sure you need to either do a TrigSub, or IntegrationByParts might also be possible. No USub available though :( Have you learned either of those methods yet?
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
yeah the substitution method.
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
i think so? remind me what that is?
 one year ago

KainuiBest ResponseYou've already chosen the best response.0
I think you might want to add and subtract +4 and 4 under the cube root so that you can factor.
 one year ago

AtiFSBest ResponseYou've already chosen the best response.0
google the concept behind it :)
 one year ago

beginnersmindBest ResponseYou've already chosen the best response.0
idk how to do this, I'm just posting so that I get notified when someone answers it.
 one year ago

KainuiBest ResponseYou've already chosen the best response.0
I could reduce it down so that it becomes \[2^{3/5}\int\limits_{}^{}\tan^{3/5} \theta \sec \theta d \theta\] after making the substitution: \[(x+2)=2\sec \theta\]
 one year ago

KainuiBest ResponseYou've already chosen the best response.0
the fraction should be 5/3 not 3/5 on the 2 and tan(theta)
 one year ago

AtiFSBest ResponseYou've already chosen the best response.0
this link will help you :) http://www.themathroom.ca/freebs/cali3/cali3.htm
 one year ago

KainuiBest ResponseYou've already chosen the best response.0
I can't seem to crack it. You're in calculus 1 or 2?
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
where did the tangent, secant stiff come from?
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
Ah sorry I was busy :C Kanoo been helping you? c:
 one year ago

KainuiBest ResponseYou've already chosen the best response.0
I was doing trigonometric substitution, but you don't learn that until cal 2. If there's an easier way with just using usub then I would be surprised! Good luck zeppy! =P
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
Ya I dunno sorry Jenny :c This doesn't seem like a problem you should be doing yet, hmm.
 one year ago

KainuiBest ResponseYou've already chosen the best response.0
Check this out: http://www.wolframalpha.com/input/?i=(x%5E2%2B4x)%5E1%2F3dx&t=crmtb01 I've never even heard of that stuff. Hypergeometric function? lol
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
Woah that looks fun :O
 one year ago

cinarBest ResponseYou've already chosen the best response.1
the last sub. should be u=2cosht
 one year ago

cinarBest ResponseYou've already chosen the best response.1
http://www.wolframalpha.com/input/?i=%28sinht%29^%285%2F3%29dt
 one year ago

cinarBest ResponseYou've already chosen the best response.1
I do not have enough information to solve this question..
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
g is the antiderivative function if g(5) = 7, then g(1) = ?
 one year ago

cinarBest ResponseYou've already chosen the best response.1
why are giving this info now, you should mention this at the beginning.. come on..
 one year ago

cinarBest ResponseYou've already chosen the best response.1
http://www.freemathhelp.com/forum/archive/index.php/t49380.html?s=81349e7c156e89af0e48100743b7ef6d
 one year ago

cinarBest ResponseYou've already chosen the best response.1
http://www.wolframalpha.com/input/?i=integrate+%28x^2%2B4x%29^%281%2F3%29dx+from+x%3D1+to+5
 one year ago

jennychan12Best ResponseYou've already chosen the best response.0
thanks for trying to help. :)
 one year ago
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