i'm trying to do some calc hw, but i ran into this equation

∞

Σ t^k = 5

k=0

is there some kind of rule which changes this equation so i can solve for k?

Printable View

- Jan 23rd 2006, 02:39 PMhongster5help with infinite sum
i'm trying to do some calc hw, but i ran into this equation

∞

Σ t^k = 5

k=0

is there some kind of rule which changes this equation so i can solve for k? - Jan 23rd 2006, 02:58 PMThePerfectHackerQuote:

Originally Posted by**hongster5**

This is,

Assuming that this infinite series**converges**then it is a geometric series for and such as its sum is 5. But its sum is given by .

Thus,

thus,

Q.E.D.

Something interesting to note,

the eqaution

Always has a unique solution,

namely,

and that,

Thus, any infinite geometric sum can be made to converge to any real number. - Jan 23rd 2006, 04:35 PMhongster5
thx alot. i wasnt thinking of geometric sequences... not that i would have known that equation anyways, lol

- Jan 23rd 2006, 04:52 PMThePerfectHacker
Welcome