limit of a multivariable function
find the limit of the following function using epsilon and delta approach
f(x,y) = [2(x)^4 + 3(y)^4]/[(x)^2 + (y)^2] as (x,y) tends to (0,0)
f(x,y) = [2(x)^4 + 3(y)^4]/[(x)^2 + (y)^2] as (x,y) tends to (0,0)
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