Suggested: x=2cos t-cos2t y=2sint-sin2t find d2y/dx2 - x^3 d^3y/dx3+2x2d2y/dx2+2y=10(x+1/x) - x=t2 y=t3 find d2y/dx2 - x2 d2y/dx2-2x(1+x)dy/dx+2(1+x)y=x3 - x=a(cost+tsint) y=a(sint-tcost) find d2y/dx^2 - solve in series the equation d2y/dx2+xy=0 - d2y/dx2-6dy/dx+9y=e3x/x2 - (1-x)d2y/dx2+xdy/dx-y=(1-x)2 - (1-x2)d2y/dx2+xdy/dx-y=x(1-x2)3/2 - (1-x2)d2y/dx2+2x dy/dx+y=0 - d2y/dx2+y=cosec x - d2y/dx2+dy/dx=(1+e^x)^-1 - d2y/dx2-2 dy/dx+y=xe^x sin x - d2y/dx2-2 tan x dy/dx+5y=secxex - x)d2y Browse related:
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