Say we have a 2-variable function f(x,y) which is not defined at (x,y)=(0,0). I wanted to make this a continuous function in (0,0) by defining it to be of a certain value at this point. If the function was a single variable, I'd set it's value at x=0 equal to the limit of the function as x approaches 0. What is the equivalent method for above when it comes to 2 variables? Is it simply the limit as x,y approach 0,0? How would one calculate this limit, and if it didn't exist, would it be impossible to make f(x,y) continuous on (0,0)? An example of f(x,y): sin(x)/x2+y2

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter3: Functions
Section3.3: More On Functions; Piecewise-defined Functions
Problem 99E: Determine if the statemment is true or false. If the statement is false, then correct it and make it...
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Say we have a 2-variable function f(x,y) which is not defined at (x,y)=(0,0).

I wanted to make this a continuous function in (0,0) by defining it to be of a certain value at this point. If the function was a single variable, I'd set it's value at x=0 equal to the limit of the function as x approaches 0.

What is the equivalent method for above when it comes to 2 variables? Is it simply the limit as x,y approach 0,0? How would one calculate this limit, and if it didn't exist, would it be impossible to make f(x,y) continuous on (0,0)?

An example of f(x,y): sin(x)/x2+y2

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