Search results

  1. G

    Integration problem - Please help

    Nope, I missed it. :rolleyes:
  2. G

    Integration problem - Please help

    Hmm... I did it by hand (subsitution, t = g + 1/2 kA/m v^2) and got this: y = -\frac{m}{kA}ln(1 + \frac{kAD}{m}) Which is the same as mathematica returned, but with an extra minus sign. Is it an error on my behalf?
  3. G

    E / natural logs

    True, but e^(pi * i) = -1. Doesn't that count?
  4. G

    E / natural logs

    Couldn't we say that \frac{e^x-5e^{-x}}{4}=1 also has two solutions, but only one in {R}?
  5. G

    Arc Length formula

    Oh, I see. That's odd. Are you sure that in the text they didn't mean that the result from the arclength formula should be x^2/2 + lnx/4 before you put in the limits?
  6. G

    Arc Length formula

    I don't see the problem, I don't get an extra 1/2 at the end. I get the same result as you do finding the function but I don't have any problem inputing back into the equation. f(x) = x^2 - \frac{ln|x|}{4} \frac{df(x)}{dx} = x - \frac{1}{4x} \frac{df(x)}{dx}^2 = x^2 - \frac{1}{2} +...
Top