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Find a formula for the nth term of the arithmetic sequence

First term 9
Common difference -2

User Donika
by
3.8k points

2 Answers

1 vote

Answer:

Explanation:

Answer is an=-2n + 11


Hope this helps :)

User Jamal
by
4.8k points
2 votes

9514 1404 393

Answer:

an = 9 -2(n -1)

Explanation:

The general formula for the n-th term of an arithmetic sequence with first term a1 and common difference d is ...

an = a1 +d(n -1)

Your sequence has a1=9 and d=-2, so the formula is ...

an = 9 -2(n -1)

User Marcel Marino
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4.1k points