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how to correctly plot 1/(x-3)

I have to plot 1/(x-3). clearly the function is not defined at x=3. Whenever I try to plot it there is a huge vertical line at x=3, which should not be there. Help me out.

The code I write sage: f(x)=1/(x-3) sage: p=plot(f(x),(x,-10,10) sage:

Thanks Amit