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Bond [772]
3 years ago
7

give an example of a convergent infinite series whose sum equal 3/5. explain how you know your series converges and write out wo

rk to show that its sum is in fact 3/5
Mathematics
1 answer:
krek1111 [17]3 years ago
5 0

Answer:

The series 1/5, 2/15, 4/45, 8/135... converges and sums up to 3/5

Step-by-step explanation:

Consider the infinite geometric series

1/5, 2/15, 4/45, 8/135...

With first term, a=1/5

common ratio, r = ⅔

The series converge because the common ratio, |r|<1.

The sum to infinity of a geometric series, S= a/(1-r)

S= 1/5 ÷ (1-⅔) = 1/5 ÷ 1/3 = 3/5

Therefore, the geometric series 1/5, 2/15, 4/45, 8/135... sums up to 3/5.

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