0.99999999999 = 1

EntirelyPossible

10*0.999 = 9.99, not 9.999. If x = 0.999, then 10x - x = 8.991.
bohm

Ep: the proof is actually sound (in the sence you can do all the manipulations in that order)
EntirelyPossible

I know, but there was a basic math error and a switching between infinity and finite.
metaspy

There isn't an easy notation to show repitend
bohm

Ah, okay. Didnt notice that.
Quarterback

Since Canada eliminated the penny, that's about right.
nicolaou

Hi EP
"there was a basic math error and a switching between infinity and finite"
I was careful in my graphic to use the recurring decimal, i.e 0.999... (I made a mistake in not doing that in the Title - too late to change it now).
So, I didn't state that "10*0.999 = 9.99", I said that 10x = 9.999...
I believe I made no mathmatical errors nor switched between infinity and finite.
I think ;)
free2beme

What number am I thinking of?
9
EntirelyPossible

Nicolau, if x = 0.999, 10x does NOT = 9.999, it's 9.99
darthfader

Which is larger an infinite set of all numbers or an infinite set of only even numbers?
http://www.scientificamerican.com/article.cfm?id=strange-but-true-infinity-comes-in-different-sizes