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Prove .99999999999999999999999999999999999999999999999999999 equals 1.

Mathematics
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that is false.....the number mentioned above ROUNDS UP to 1....meaning it is closer to one than it is to 0 :)
Good job! Now try .9 repeating!
its the exact same explanation thou stubborn being

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Other answers:

If you mean 0.999... (i.e. 9's repeating for ever) then this can be proved
Go fir it!
is this a challenge or are you looking for help in trying to prove it?
I want to prove it.
ok, start by setting:\[x=0.999..\]Then see what happens if you multiply both sides by 10
10x=0.999(10)
or 9.999999999---
10=9.99999999 on and on
correct - and now notice that 9.99... can be written as 9 + 0.999...
right
and what is 0.999.... (look at how we started the proof)
you mean =x?
perfect!
so you end up with: x = 0.999... 10x = 9.999... = 9 + 0.999... = 9 + x
ohhhhh. Thanks!!!
yw :)
  • phi
how about x=0.9999... 10x= 9.9999... 10x-x = 9 9x=9 x=1
thats basically exactly what we have done :)
  • phi
yes, just wanted it all in one post for other readers

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