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Problem #3: The tangent plane of f(x,y) = 3xy - 4xy5 at the point (1,1) can be expressed in the form z = ax

Problem #3: The tangent plane of f(x,y) = 3xy - 4xy5 at the point (1,1) can be expressed in the form z = ax + by + c. (a) What is the value of b? (b) What is the value of c? Problem #3(a): Problem #3(b):

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