Recent content by faruk

That's exact the problem. exp(-x²) belongs to the unintegratable functions. It's the cause we use the table of the normal distribution probability. I hope to be wrong. Please help me.

Normal distribution. What is the value of sigma (dispersion) for maximal probability P(1<x<2) ? Excel calculation: sigma is about 1.471. But what would be an analytical solution? http://img500.imageshack.us/img500/558/normdistrib19ql.gif

http://en.wikipedia.org/wiki/Birthday_paradox :smile:

electron: m, v proton: M, u mv²/2 = Mu²/2 mv² = Mu² v²/u² = M/m v/u = sqrt(M/m) = sqrt(1836) = 42.85 (valid for v << c)

138,500*(1+0.002)^y = 533,800*(1-0.006)^y 138,500*(1.002)^y = 533,800*(0.994)^y ln(138,500*(1.002)^y) = ln(533,800*(0.994)^y) ln(138,500) + ln((1.002)^y) = ln(533,800) + ln((0.994)^y) ln(138,500) + y*ln(1.002) = ln(533,800) + y*ln(0.994) y*ln(1.002) - y*ln(0.994) = ln(533,800) - ln(138,500)...