Thread: check this out

http://www.sunlightd.com/m-math/Recurring.htm

Looks like he still remembers that old thread too....

What thread? A link would be nice if possible.

Also, what does it say? I don't want to download that whatever math thing b/c my comp is slow enough as it is.

i've downloaded the math thing, and it doesn't seem bulky. (then again, in windows...)

here's basically what it says:
where E is the weird symbol for infinty and stuff... i haven't taken calculus so i don't know what its name is

Proof that 0.9 recurring equals 1
1-.9 = 10 ^ -1
1-.99 = 10 ^ -2
1 - .99999 = 10 ^-5

Code:

    x
1 - E (9 x 10 ^ -x) = 10 ^ -x
   i=1

However:

Code:

lim x->infinity {10 ^ -x } = 1/(ln 10) * lim x->infinity { e^-x} = 0
                                 x
therefore  lim x-> infinity { 1- E (9 x 10 ^ -i)} = 0
                                i=1