Question: In Problems a-c, show that the indicated function is a solution of the given differential equation; that is substitute the indicated function for y to

In Problems a-c, show that the indicated function is a solution of the given differential equation; that is substitute the indicated function for y to see that it produces an equality.
a. dy/dx + x/y = 0; y = √1 - x2
b. - x dy/dx + y = 0; y = Cx
c. d2y/dx2 + y = 0; y = C1 sin x + C2 cos x

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