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IRISSAK [1]
2 years ago
14

Find the formula for the nth term of the arithmetic sequence -39, 61, 161, 261, ...

Mathematics
1 answer:
maksim [4K]2 years ago
6 0
<h3>Given that it is arithmetic</h3>

d = a_{2} - a_{1} = 61 - ( - 39) = 100

a_{n} = a_{1} + (n - 1)d \\ a_{n} = - 39+ 100 (n - 1) \\ a_{n} =  - 39 + 100n - 100 \\ a_{n} =  - 139 + 100n

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