b) 11. Find all second partial derivatives of the function f(x, y) = ln(1 + x2y3),...

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b) 11. Find all second partial derivatives of the function f(x, y) = ln(1 + x2y3), and show that the mixed partial derivatives, fry and fyr, are equal. b) 11. Find all second partial derivatives of the function f(x, y) = ln(1 + x2y3), and show that the mixed partial derivatives, fry and fyr, are equal.