In what directions is the derivative of f(x,y)= xy + y² at P(6,7) equal to zero? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. (Simplify your answer, Use a comma to separate answers as needed. Type your answer in terms of i and j.) B. There is no solution.

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Q: Column A Column B Column C Column D Column E Column F Column G Column H 40 1 4-1 1 4-2 4-3 16 64 30 ...

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