Lecture6bc - Welcome to Math 122 Lecture 6 Survey of Calculus and its Applications I1 Instructor Quanlei Fang Dept of Math University at Buffalo Spring

Lecture6bc - Welcome to Math 122 Lecture 6 Survey of...

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Instructor: Quanlei Fang Dept. of Math, University at Buffalo, Spring 2009 Welcome to Math 122 Lecture 6 Survey of Calculus and its Applications I1 Partial derivatives Last time Last time Definition Example Partial Derivative of f ( x , y ) with respect to x : written , the derivative of f ( x , y ), where y is treated as a constant and f ( x , y ) is considered as a function of x alone If , then x f ( ) 4 3 2 , y x y x f = . 8 and 6 3 3 4 2 y x y f y x x f = =