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hellow Group TitleBest ResponseYou've already chosen the best response.0
Do you mean \[d^2/dxdy (x^3+y^33x12y)\]? In that case we first differentiate with respect to y, and then w.r.t x. So \[d^2/dxdy(x^3 + y^3 3x 12y) = d/dx[d/dy(x^3 + y^3 3x 12 y)] = d/dx (3y^2 12) = 0\]
 2 years ago

Mehrdad Group TitleBest ResponseYou've already chosen the best response.0
The answer is "Zero", in second derivative when one for x and one for y, if the function do not have a sentence that contains both x and y, the derivative of x and y with be zero
 2 years ago
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