Yes there is. It's 0.3 with a dot over the 3. It stands for 0.3 recurring and represents the fraction 1/3.

Pi is exactly 3.

"In base pi, pi is exactly 10. This is much easier to remember."

And actually it can be a line or dot over the 3 to mean repeating.

Fair enough - I was always taught it was a dot, but obviously that'd work too.

And the pi in base pi line always makes me laugh **far** more than it should.

...? I was just asking a question ,which you didn't answer, Jon`C. What do you mean by "only recently understood"?

A slight tanget here [heh, math pun], but can someone tell me what the kakkar this calculus malarky is? Never heard of it in my life apart from Films.

[QUOTE=West Wind]you are correct, .333 is rational, and does have an equivalent fractional form: 333/100, as you keep adding 3's the fractional form increases correspondingly (3333/1000, 33333/10000, so on) again, the limit as this series progresses towards infinity is 1/3, but it is never actually 1/3 itself.[/QUOTE]

No. The limit of the partial sums of an infinite sequence is the sum of the series; .333... = exactly 1/3. That's simply the definition of an infinite series.

But that's merely tangential to the real issue. I already explained that every real number is defined as the limit of a Cauchy sequence; if two sequences are equal, by definition they represent the same real number. With this in mind, please rationalize how the sequences representing .999... and 1 can belong to the same equivalence class, yet still be different numbers.

In a nutshell, calculus is a branch of maths involving summing up of infitesimal bits of complicated functions to ... bugger me this is harder than i thought! I *know* what calculus is, but is quite hard to just sum up (maths pun - groan).

if you take maths in your highers, you'll come across it very soon. You'll likely first use it to look at rates of change - at least that's how the subject was first broached to me when I was about your age

Err, actually Pcysqznpkhcyn, it's the stuff we're doing in highers just now.

And once again, Argath wins the thread, sending his foes running with their tails between their legs.