Calculate the second-order mixed partial derivative of 2 2 f axdy where f (x , y) = 4y" + x . In(4y) for y > 0. Hint: Think about the order of differentiation. a2 f ardy = 1 Check (3) standard function logic vector obc unit Search CO ENG 6:0 stly sunny US 20/8/ Fo FZ F8 FO FZ F4 F5 F10 Insert Delete F3 Pn Sc LA Backspace