mpj4
  • mpj4
isn't the integral of dx / [x (7x^2 - 5)^(1/2) ] = 1/a arcsec u/a??
Mathematics
chestercat
  • chestercat
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mpj4
  • mpj4
I ask because I applied it and I got it wrong.
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mpj4
  • mpj4
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ganeshie8
  • ganeshie8
looks you forgot to put the absolute value bars

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mpj4
  • mpj4
maybe
mpj4
  • mpj4
my solution
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mpj4
  • mpj4
forgot to square the a=5 and the integral signs. Sorry, was a bit hasty making it.
Michele_Laino
  • Michele_Laino
you can try this substitution: \[\large \sqrt {7{x^2} - 5} = \sqrt 7 x + t\] where t is the new variable of integration
mpj4
  • mpj4
Ok, thanks!

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