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need 11,12,13 with detailed explanation please
For each function, evaluate the stated partials. f(x,y) = 5x3 + 4x2y2 – 3y2 - 11. fx(-1,2), fy(-1,2) g(x,y) = ex2 + y2 12 9x(0,1), gy(0,1) f(x,y) = ln(x - y) + x3y2 13 fx(2,1), fy(2,1)