el-half said:That is a paradox. If something infinite reaches a finite point it is not infinite.

I don't get how you can think that 0.9r = 1

0.9r + 0.0r1 = 1

0.0r1=0. Duh!

.000000000000000000000000000000000000000000000000000000000...1!

I know of another way to prove that 0.9r=1.

Let x=0.9r

10x=9.9r

(.99999999999999999999...*10=9.99999999999999999999...)

10x-x=9.9r-0.9r

9x=9

x=1

0.9r=1

See?

No divide by 0s or any of that mathematical nonsense!