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I'm sort of new to the calculation of limits of functions defined in R^2( or R^n, n>=2)

exp. the limit of sqrt{hk/(h^2+k^2)} as (h,k) --> (0,0)

I think it should be 1/sqrt(2) if we let h=k. but i'm not sure if this is the right approach.

what about other limits in the form "0/0" as x={x1,x2...xn}-->0 (x is an element of R^n)?

just make x1=x2=...=xn?

Thanks.

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# Limit in R^2

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