Recent content by quantitative

  1. Q

    Undergrad Integrate this integral from 0 to x of e^(-t^2)

    Don't you square it. Rename a variable. Then transform to polar co-ords. Then you get left with something along the lines of... I^2 = 2pi.int^x_0 r.e^(-r^2)dr which is easy. Think it's also called the guassian integral or probability integral and must be one of the most common...
  2. Q

    Graduate Solving (1/α) * dT/dt for Exact Analytical Solution

    Bit of a guess but a different way... use Feyman-Kac to represent PDE as an SDE. Then integrate SDE to have a distribution result.
  3. Q

    Undergrad Find Derivative of y=2^x Using Definition

    dunno if I'm missing the point here but... write y=2^x as y=exp(x.ln2) => y'=ln2.exp(x.ln2)