Find the critical point of the function f(x, y) = – (25x + 5y² + In(]x + y[). c = Use the Second Derivative Test to determine whether it is A. a local minimum B. a local maximum C. test fails D. a saddle point

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Q: at x = The function has a relative minimum of at x = The function is increasing on the interval(s):

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A: Given that,f(x, y)=2x3-3y2-6xy-12x

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A: solution is given below...

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