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Morgarella [4.7K]
3 years ago
12

Find the 84th term of the arithmetic sequence 18, 31, 44, ...

Mathematics
1 answer:
Hunter-Best [27]3 years ago
6 0

Answer:

common difference = 31-18

common difference =13

from,

An=A1 +(n-1)d

A84=18+(84-1)13

A84=1097

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The sum of series of 4+ 15 + 26 + ….. + 213
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Decompose the terms in the sum as

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