Question

Find the sum, if it exists.
75+15+3+

Answer 1

you want to add it ? o.O

Answer 2

75+15+3+ ?

Answer 3

sorry the problem is written as 75+15+3+...
Not sure what to do?

Answer 4

This a geometric serie.
75,15,3....

Common ratio being 3, first term 75
And add up to infinite.. :|

Answer 5

That's a geometric series with r = 1/5. Use the summation formula :-)

Answer 6

Common ratio 0.2 sorry

Answer 7

It converges, r < 1.

Answer 8

In general: \[ S_{\infty} = \frac{a_1}{1-r} \]for |r| < 1.

Answer 9

Plug in now @onley , what did you get?