On 9 Maj, 20:01, JT <jonas.thornv...@gmail.com> wrote: > http://www.wolframalpha.com/input/?i=0.499999999999999999999999999999... > > n = -1. > 0.49999999999999999999999999999999999999999 = (n/2-1)/n > > http://www.wolframalpha.com/input/?i=%3D%2810000000000000000000000000... > > 0.49999999999999999999999999999999999999999=(100000000000000000000000000000000000000000/2-1)/ > 100000000000000000000000000000000000000000 > > I do not understand to, can please someone explain why and how wolfram > get -1 for the upper calculation, it is obvious using the one below > what the solution is? > > And if there was two solutions should not Wolfram give them both? What > is going on here, i am total newb to math calculators so tell me what > is going on?