Question: If x2 + y = 81 and da / dt = 9, find dy/ dt when y is positive and (a) x = 0: dy

If x2 + y" = 81 and da / dt =

9, find dy/ dt when y is positive and (a) x =

If x2 + y" = 81 and da / dt = 9, find dy/ dt when y is positive and (a) x = 0: dy dt = (b) x = 1: dy/ dt = (c) a = 4: dy/dt =

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