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Mathematics 20 Online
OpenStudy (anonymous):

How do you know if a function is continuous in some point? Do you have to calculate +lim and -lim, and if they are the same function is continuous? For example: f(x,y)=(x^2*sin(y/x) if xy=/0 0, if xy=0) is this continuous in (0,0) and (0,1)?

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