Question

Find the sum to infinity of the series 40 - 24 + 14.4 -....

Answer 1

What do you mean by ...... on your question?

Answer 2

Broaden it please

Answer 3

Seems like the values are getting smaller so it has to be smaller than 40

Answer 4

..... means the rest of the terms in the series
i think its a geometric??

Answer 5

Yeah I really don't know how the series changes as n= goes to infinity.

Answer 6

this is a geometric series where you multiply by \(\displaystyle-\frac{3}{5}\) each time

Answer 7

use the formulae described here for the sum to infinity: http://en.wikipedia.org/wiki/Geometric_progression

Answer 8

its n = 1 to infinity, i assume

Answer 9

no 0 to infinity

Answer 10

\[\sum_{k=0}^{\infty}ar^k=\frac{a}{1-r}\]

Answer 11

ok - i checked your link
its a / 1 - r

Answer 12

thanx

Answer 13

in your case a=40 and r=-3/5

Answer 14

right 40 / 1 + 0.6
= 25

Answer 15

correct