03-12-2009, 12:38 PM
Philly Mike Wrote:zdunklee Wrote:You said that when you changed the numbers in the proof, that is what that is a proof, if you change the numbers you are changing the proof.
I know that if you multipy 9* 0.999 it equals 8.9999... which in turn = 9. But that is NOT what I did in the proof. I didn't ever multiply 9 * 0.9999 ever in the proof.
The 9x = 9 comes from the previous step in which 10x-x - 9.999... - 0.999..., that is what a proof is, it is logical steps that follow from one to the next.
WTF are you talking about???
x = 0.9999...
10x = 9.9999...
10x - x = 9.9999... - 0.9999...
9x = 9
x = 1.
that is exactly what you wrote
you just said yourself that 9*0.999... would be 8.999...
the reason you did the statement was to show how you make it = 1 but if the math is done properly you prove that 0.999... = 0.999... and that's it.
No it doesn't in a proof you have to get the next step from the previous, I am not multiplying 9*0.999... anywhere in the proof, I am subtracting 10x - x.
Subtract the line above that, and tell me what you get.
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