the first term of a geometric series is 8. the sum to infinity of the series is 10. find the common ratio?

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2007-01-28 08:37:00 · 3 answers · asked by L 5 in Science & Mathematics ➔ Mathematics

a = 8
Sum to infinity = a / (1-r) = 8 / (1-r) =10

8 = 10 - 10r, so, r = 1/5

2007-01-28 08:40:45 · answer #1 · answered by tsunamijon 4 · 0⤊ 0⤋

all of us understand that when the sum starts off at n=a million, the endless sum of a geometrical sequence with 0

2016-12-16 15:44:17 · answer #2 · answered by zabel 4 · 0⤊ 0⤋

I found it.

2007-01-28 08:45:20 · answer #3 · answered by pnybt 4 · 0⤊ 0⤋