Recent content by Oneiromancy

  1. O

    Typing Superhumans: The Mystery Unveiled

    About 75 wpm with Qwerty. Also WOW if you're typing at 110 with Qwerty. With lot of chatting and foruming with Dvorak, you could get up to 160 easily. Fastest typist on the world was clocked at around 215 wpm on Dvorak I think.
  2. O

    Typing Superhumans: The Mystery Unveiled

    I switched to the Dvorak layout about a year ago and my wpm is around 120 or so right now. You won't get that with Qwerty. http://homepage.mac.com/chinesemac/LatinExtended/graphics/Dvorak.jpg
  3. O

    Higher mathematics learning techniques

    You're referring to an extreme case here...We're talking about normal, healthy, human beings here, not mentally retarded people with cretinism.
  4. O

    Why does the constant in integration get multiplied instead of canceled out?

    So I could set the LHS constant to be C_1 and the RHS to be C_2 then their difference can be a new constant A?
  5. O

    Why does the constant in integration get multiplied instead of canceled out?

    I solved a pretty routine first-order diff. eq. where you simply separate the variables. xcos(x)(dy/dx) - sin(y) = 0 => \int cot(y)dy = \int dx/x Now, I thought that you would get an arbitrary constant, C, on both sides and they would cancel each other out, but that's wrong. My book...
  6. O

    Derivative and Integral Question

    I understand how to get the answer now, thanks.
  7. O

    Derivative and Integral Question

    I meant dy/dt. :) I will try to solve these again a little later, thanks.
  8. O

    Derivative and Integral Question

    1. y = 3^^{}log_{}_{}_2^{}(t) Find dy/dx ... I tried using logarithmic differentiation but that didn't work. 2. \int x^{2x}(1 + ln x)dx\ ... I set u = x^{2x} but my du didn't quite work out right.
  9. O

    High School Free Video Lectures - Learn Calculus Online

    www.freevideolectures.com I found this a few weeks ago and it's a definite gold-mine. It's a relatively new website and they get new submissions all the time so hopefully the sections that lack extensive material expand. I've been using the calculus section which is pretty good.
  10. O

    Are local extremum possible at endpoints of a closed bounded interval?

    I thought local extremum did not exist at the endpoints of a closed bounded interval, however my textbook claims this. Wikipedia: "A continuous (real-valued) function on a compact set always takes maximum and minimum values on that set. An important example is a function whose domain is a...
  11. O

    Lim y->0: Solving (sin 3y * cot 5y) / (y * cot 4y)

    I know what to do now.
  12. O

    Lim y->0: Solving (sin 3y * cot 5y) / (y * cot 4y)

    Correct. Sorry I'm not good at latex.
  13. O

    Limits Homework Help: Questions on \lim_{x\rightarrow 0}

    x / sin x can become 1 / (sin x / x) which equals 1/1 = 1.
  14. O

    Lim y->0: Solving (sin 3y * cot 5y) / (y * cot 4y)

    lim y->0 (sin 3y * cot 5y)/(y * cot 4y) Tricky problem to me. I understand what to do if the problem was something like sin 5x / 4x.
  15. O

    Finding the Limit of cos(pi*x / sinx)

    Ya thanks it's -1.