anonymous
  • anonymous
Double integral problem (attachment below) I am unable to figure out how to solve r*root(1+r^2 /4) within the dr integral :S Any help would be much appreciated! (Just the method to solve it should be enough) :)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
I was thinking product, but It seems too complicated to be so
ganeshie8
  • ganeshie8
have you tried u-substitution ?

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anonymous
  • anonymous
Yes
ganeshie8
  • ganeshie8
u = 1+r^2/4 works smoothly right ?
anonymous
  • anonymous
Tried that, but I can retry it - in case I did it wrong
ganeshie8
  • ganeshie8
u = 1+r^2/4 du = ?
anonymous
  • anonymous
Thanks! It worked :) I somehow messed up the du part. I was trying to get du on one side, and saw the dr part didnt match, when I should have gotten dr alone to replace it instead @.@

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