limiting sums (3 Viewers)

[jet]

To build gurmies' answer, if |r| < 1, then the series will converge to a value, instead of diverging to infinity, if |r| > 1. If these series converges, then we can find its sum, though, if it diverges, the sum, as n -> infinity, is infinite.

 

[kurt.physics]

To build gurmies' answer, if r < |1|, then the series will converge to a value, instead of diverging to infinity, if r > |1|. If these series converges, then we can find its sum, though, if it diverges, the sum, as n -> infinity, is infinite.

Dont you mean |r| < 1 ... ;P

 

[jet]

Dont you mean |r| < 1 ... ;P

Lol yes. My mistake.

 

[cutemouse]

what i dont get is how ppl who haven't studied 2u maths for over a year still remember this stuff?

i studied it LAST TERM and i'm already forgetting.

This stuff is easy, it's all essentially the same. All you need to remember for a limit sum is that |r|<1 and a/(1-r) ... Not really that hard IMO.