strange behaviour with simple decimals

I think this is not a function of decimal base.

Computing     x+1-x  using finite precision, in any base, may be 
different from 1.
RJF

Barton Willis wrote:

>Try:
>
>(%i1) 1/(abs(1+2*g) - abs(2*g))$
>(%i2) plot2d(%,[g,0,19]);
>
>
>Barton
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