Write an equation for the nth term of the arithmetic sequence: -3, -5, -7, -9, ...

ivybeibeidn 2022-09-06 Answered
Write an equation for the nth term of the arithmetic sequence: -3, -5, -7, -9, ...
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Answers (1)

Ricky Lamb
Answered 2022-09-07 Author has 7 answers
The formula for an arithmetic sequence is a n = a 1 + ( n - 1 ) d
where a 1 is the first term and d is the difference between terms.
In this case a 1 = - 3 and d=−2
a n = - 3 + ( n - 1 ) ( - 2 ) = - 3 - 2 n + 2 = - 2 n - 1
a n = - 2 n - 1
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