We know we find d^2y/dx^2 by taking the derivative of dy/dx with respect to t, and then dividing by x, but why do we need to divide by dx/dt?
Why do you divide by dx|dt when determining the concavity of a parametric curve?
We know we find d^2y/dx^2 by taking the derivative of dy/dx with respect to t, and then dividing by x, but why do we need to divide by dx/dt?
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