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Indefinite Integral?

  • Thread starter sausu
  • Start date
  • #1
2
0

Homework Statement



integral 1/(x(sqrt(x^2 - 4)))

Homework Equations



I don't know if there are any "equations" for integrals...


The Attempt at a Solution



Int(1/(x(Sqrt(4(x^2 /4)-1)
Int(1/(2x(Sqrt((x^2 /4)-1)
1/2 int(1/(x(Sqrt((x /2)^2)-1)
U-sub
u=x/2
du=1/2 dx
2du= dx
(This is where I hit a wall..I have no clue what I'm doing)
 

Answers and Replies

  • #2
867
0
For this one, you'll want to use a trig substitution instead of a regular u-substitution.
 
  • #3
2
0
For this one, you'll want to use a trig substitution instead of a regular u-substitution.
We never learned how to do a trig substitution...
BTW I'm only in Calculus BC. We're just learning the basics of integrating.
 

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