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4 votes
Nth term of this sequence please 18, 16, 14, 12

User VladacusB
by
7.1k points

1 Answer

3 votes

Answer:


\boxed{\sf -2n+20}

Explanation:

Let’s find the common difference.

The common difference can be found by subtracting a term in the sequence with the previous term.


\sf d=16-18\\d=-2

Apply formula for the
\sf n^(th) term of an arithmetic sequence.


\sf a_n=a_1+dn-d


\sf a_1 is the first term of the sequence.


\sf d is the common difference.


\sf a_n=18+-2n-(-2)


\sf a_n=18+-2n+2


\sf a_n=-2n+20

User Guapolo
by
6.6k points
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