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Problems
In Problems 1-23, find the second derivative. 24 Find the third derivative of y = x2 - 2/x. 25 A particle moves according to the equation s = 1 - 1/t2, t > 0. Find its acceleration. 26 An object moves in such a way that when it has moved a distance 5 its velocity is v = √s. Find its acceleration. (Use Example 3.) 27 Suppose u depends on x and d2u/dx2 exists. If y = 3u, find d2y/dx2. 28 If d2u/dx2 and d2v/dx2 exist and y = u + v, find d2y/dx2. 29 If d2u/dx2 exists and y = u 2, find d2y/dx2. 30 If d2u/dx2 and d2v/dx2 exist and y = uv, find d2y/dx2. 31 Let y = ax2 + bx + c be a polynomial of degree two. Show that dy/dx is a linear function and d2y/dx2 is a constant function. 32 Prove that the nth derivative of a polynomial of degree n is constant. (Use the fact that the derivative of a polynomial of degree k is a polynomial of degree k - 1.)
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