Maths - Page 2 - SV650.org

25-10-07, 01:29 PM

Quote:

Originally Posted by Supervox

It's NOT logic at all - just incorrect maths !!

a = 0.999 is correct

10a = 9.999 is incorrect

10a = 9.99

Therefore 10a - a 9.999 - 0.999 is incorrect it should read 9.99 - 0.999

which then gives the correct answer 8.991

Simple really

You missed the crucial ... which means literally "and so on" and is used to show a repeating pattern, in this case 0.999999999999999999999999999999999 (recuring to infinity)

Work is out again with this crucial difference and the linked page is quite correct

Spanner Man · 25-10-07, 01:30 PM

Quote:

Originally Posted by Bear

A calculator? No.

My poor aching brain on the other hand...

Mine was aching too, so I cheated & grabbed my calculator!

Cheers.

25-10-07, 01:32 PM

Quote:

Originally Posted by rigor

You missed the crucial ... which means literally "and so on" and is used to show a repeating pattern, in this case 0.999999999999999999999999999999999 (recuring to infinity)

Work is out again with this crucial difference and the linked page is quite correct

Exactly! Which is why Spannerman's explanation doesn't add up either.

Supervox · 25-10-07, 01:35 PM

My maths is only incorrect if you accept the concept of infinity.

Personally I don't - to everything there must be an end.

Moving on - if there is an end, then 10a - a will always result in 8 followed by a finite number of 9's and the final number will be a 1

25-10-07, 01:36 PM

You can't do maths without infinity.

25-10-07, 01:37 PM

you cant do complex maths with out infinity, everyday stuff you can!

25-10-07, 01:38 PM

Quote:

Originally Posted by Supervox

My maths is only incorrect if you accept the concept of infinity.

Personally I don't - to everything there must be an end.

That's a shame, how do you show 1/3 in decimal form then?

25-10-07, 01:38 PM

im having hotdogs for tea

25-10-07, 01:42 PM

Quote:

Originally Posted by neio79

you cant do complex maths with out infinity, everyday stuff you can!

Even not terribly complex maths needs infinity, but I get your point. I was meaning proper maths not just adding up and taking away.

25-10-07, 01:46 PM

I like this other proof that 0.999...... = 1

1/3 = 0.333...

3 x 1/3 = 1

3 x 0.333... = 0.999...

therefore 0.999... = 1

I love maths

25-10-07, 01:35 PM	#14
Supervox No more Mr Nice Guy Mega Poster Join Date: Jun 2005 Location: Saaafffend, innit !! Posts: 1,365	Re: Maths My maths is only incorrect if you accept the concept of infinity. Personally I don't - to everything there must be an end. Moving on - if there is an end, then 10a - a will always result in 8 followed by a finite number of 9's and the final number will be a 1 __________________ Never argue with an idiot - he'll drag you down to his level and then beat you with experience

25-10-07, 01:36 PM	#15
sarah Guest Posts: n/a	Re: Maths You can't do maths without infinity.

25-10-07, 01:37 PM	#16
neio79 Guest Posts: n/a	Re: Maths you cant do complex maths with out infinity, everyday stuff you can!

25-10-07, 01:38 PM	#18
hovis Guest Posts: n/a	Re: Maths im having hotdogs for tea

25-10-07, 01:46 PM	#20
rigor Guest Posts: n/a	Re: Maths I like this other proof that 0.999...... = 1 1/3 = 0.333... 3 x 1/3 = 1 3 x 0.333... = 0.999... therefore 0.999... = 1 I love maths

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