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OpenStudy (anonymous):
What does d2y/dx2 mean and how do i apply that to the equation 2cos(x/2)?
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OpenStudy (anonymous):
d^2y/dx^2 means second derivative
OpenStudy (anonymous):
y=2cos(x/2) First find dy/dx then d^2y/dx^2 = d(dy/dx) /dx
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