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iren2701 [21]
3 years ago
8

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

Mathematics
1 answer:
Annette [7]3 years ago
8 0

Answer:

\boxed{\sf -2n+20}

Step-by-step 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

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