how to find partial derivatives

e that the two notations for the mixed second partials have opposite conventions for the order erentiation. In the "a" notation the derivatives are taken right to left, and in the "subscript" on they are taken left to right. The conventions are logical if you insert parentheses; Right to left Differentiate Leh wright Differentiale inside the purcalheses first. inside the parentheses Bad ample 12 Find the second-order partial derivatives of f(ry ry try tion. We have I _ 2ry tAry and wytr - (3xy'try= buy Third-order, fourth onder, and higher order partial derivatives can be obtained by such ive differentiation, Some possibilities are 28:C Haze