Can you help me please? Which is the value of this integral? $\displaystyle \displaystyle\int_{0}^{\infty}\displaystyle\frac{l nx}{1+x^2}dx $ Thanks
Last edited by osodud; Dec 7th 2009 at 06:23 PM.
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That's a definite integral. What is lu(x)? Did you mean ln(x)?
it's finite and its value is zero. put $\displaystyle x=\frac1t.$
Originally Posted by Bruno J. That's a definite integral. What is lu(x)? Did you mean ln(x)? Yes you are right Can you help me?
Originally Posted by Krizalid it's finite and its value is zero. put $\displaystyle x=\frac1t.$ Slick! Try it, osodud.
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