problem_set_6

problem_set_6 - 1 Name: First MI Last Student ID # Problem...

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Unformatted text preview: 1 Name: First MI Last Student ID # Problem Set #6 Score Section: C REDIT 2 1 Problem #1 . Evaluate lim ( x , y ) (0, 0) f ( x , y ) or show that the limit does not exist where f ( x , y ) = x 2 2 x 4 y 4 y 2 x 2 y 2 . C REDIT 2 1 Problem #2 . Consider the function f ( x , y ) given by f ( x , y ) = x 2 y y 2 + x 4 . Show that the limit as x , y 0,0 of this function does not exist. In particular, show that all straightline approaches to the origin yield zero but that other approaches give different answers. Math 32A Lecture #5 Fall 2007 2 Problem Set #6 C REDIT 2 1 Problem #3 . Evaluate lim ( x , y ) (0, 0) f ( x , y ) or show that the limit does not exist where f ( x , y ) = sin xy xy . C REDIT 2 1 Problem #4 . Let f ( x , y ) = ax 2 by 2 x 2 y 2 . Under what conditions (on a and b ) does lim ( x , y ) (0, 0) f ( x , y ) exist? Show the complete derivation. 3 Problem Set #6 C REDIT 2 1 Problem #5 . For any with 0 2 , show that |cos | + |sin...
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problem_set_6 - 1 Name: First MI Last Student ID # Problem...

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