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#1 Help Me ! » Probability Proof » 2007-12-09 18:59:01

saxmaestro
Replies: 2

Can someone help to show rho(1/2)=√(PI)  both with regular numbers and polar coordinates and that they equal each other.  (I have the proofs I just have to prove they equal each other)  rho(1/2)=(from 0 to ∞)∫[x^(-1/2)*e^-x]dx
Then let u²=x       
2udu=dx
du=(dx)/(2u);du=dx/2√(x)

2(from 0 to ∞)∫e^(-u²)du = 2[(√(PI))/2]=√PI

and then with polar coordinates

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