let(adsbygoogle = window.adsbygoogle || []).push({}); ,as a function of two variable, be defined from R[itex]^{+}_{2}[/itex] to R then is it continuous at (1,1) ? if so what's the image ? here the domain is D={ (x,y)/ x ε R[itex]^{+}[/itex] , y[itex]\in[/itex]R[itex]^{+}[/itex] }. like detailed discussion :).log[itex]_{x}[/itex]y

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# What's the value of log 1 to the base 1 ? is it defined or not ?

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