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OpenStudy (anonymous):
Working on a surface integral problem but forgot how to do a U-Sub trick. Can someone give me some hints?
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OpenStudy (anonymous):
\[\int\limits_{}^{}r ^{3}\sqrt{4r ^{2}+1}dr\]
OpenStudy (anonymous):
u=4r^2+1
OpenStudy (anonymous):
Oh wait, nvm I got it. Open Study, Y U SLOW?
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