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TrapQueen665
04.07.2021 •
Mathematics
the sum of the first n terms of a sequence is 20 - 10 / 2 ^ n - 1 find the sum of the first five terms
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Ответ:
Step-by-step explanation:
Given that,
The sum of first n term of a sequence is![S_n=20-\dfrac{10}{2n-1}](/tpl/images/1388/8627/3acd3.png)
We need to find the sum of the first 5 terms.
Put n = 5,
So, the sum of first 5 terms is equal to
.
Ответ: