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Homework Help: Differential Equations 2 order and objectives

  1. May 22, 2012 #1
    Help pls decide this Differential Equations!I did not coincide with the answer and in some no idea how to do! will be very grateful if you start a proper solution to Us
    1) y(4)+2*a2*y''+a4*y= cos(ax)
    2) y' = x + 1/y; y(0)=1
    3) y' = 2*x + cos(y); y(0) = 0
    4) y(x) - λ*(0 to pi)∫(x*sin(t)*y(t)*dt = 0 (find λ and y(x))
    5) Parachutist descends on a parachute! Gravity parashyuta F1 = mg, and the force of air resistance F2 = k * v ^ 2, k = const find speed through chute t0 seconds after the shutter and the path traversed by S while!
  2. jcsd
  3. May 22, 2012 #2


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    Gold Member

    1. Not clear. Check if you've typed it correctly. Isn't there supposed to be a term in y'? Instead there are 2 terms in y?

    2. Express in homogeneous form. You might have to do a translation of axes.
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