Consider the following. z = x2 + y2, x = 4s + 8t, y = s +t az az and as Find by using the chain rule. (Enter your answers in terms of s and t.) at az as az at az az and by first substituting the expressions for x and y to write z as a function of s and t. (Enter your answers in terms of s and t.) Find əs at az as az at az agree? as Do your answers for O Yes O No az agree? at Do your answers for O Yes No

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