anonymous
  • anonymous
Can someone help me in u substitution i forgot how to do that.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Yes
anonymous
  • anonymous
Post a problem
anonymous
  • anonymous
What's the problem?

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anonymous
  • anonymous
If the substitution \[u=\sqrt{x-1}\] is made, the integral \[\int\limits_{2}^{5} \sqrt{x-1}\div x dx=\]
anonymous
  • anonymous
u=\[\sqrt{x-1}\]
anonymous
  • anonymous
so du= \[1\div(2(\sqrt{x-1})\]
anonymous
  • anonymous
try it from there
anonymous
  • anonymous
ok i've got that so far
anonymous
  • anonymous
i need to find x too right?
anonymous
  • anonymous
no because u is equal to that part of the denominator
anonymous
  • anonymous
so you have, 2\[2\int\limits_{}^{}u^2/(u^2+1)\]
anonymous
  • anonymous
ok i don't get how you got that.
anonymous
  • anonymous
http://www.wolframalpha.com/input/?i=integrat%3A+%28%28x-1%29^%281%2F2%29%29%2Fx
anonymous
  • anonymous
go there but don't forget the domain of integration
anonymous
  • anonymous
thanks

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