The arithmetic sequence a_ia
i
a, start subscript, i, end subscript is defined...
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Mathematics, 18.04.2020 06:19, tayler1911
The arithmetic sequence a_ia
i
a, start subscript, i, end subscript is defined by the formula:
a_1 = 5a
1
=5a, start subscript, 1, end subscript, equals, 5
a_i = a_{i - 1} + 2a
i
=a
i−1
+2a, start subscript, i, end subscript, equals, a, start subscript, i, minus, 1, end subscript, plus, 2
Find the sum of the first 700700700 terms in the sequence.
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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