How can I calculate (0.999...) on a calculator?

Apr 2014
15
0
Edmonton
Does anyone know how to do this? I've searched and searched online.
 

topsquark

Math Team
May 2013
2,532
1,051
The Astral plane
You are just trying to get 0.999999999999999999999999999999999999999999999 on your calculator? Why not just type it in? You could also do 1/1.00000000000000001. On some calculators you can potentially tell it to compute 1/3 as a decimal, then multiply the decimal by 3.

-Dan
 

skeeter

Math Team
Jul 2011
3,363
1,854
Texas
\(\displaystyle 0.999... = \sum_{k=1}^\infty \dfrac{9}{10^k} = \dfrac{9}{10} + \dfrac{9}{100}+ \dfrac{9}{1000} + \, ...\)

and on my calculator ...

Sum_0.999.jpg

... well, looks like SDK was correct.
 
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