Question: Write a formula for the general term (the nth term) of the arithmetic sequence a1,a2,a3,a4,.... Then use the formula for an to find a20, the

Write a formula for the general term (the nth term) of the arithmetic sequence

a1,a2,a3,a4,....

Then use the formula for

an

to find

a20,

the 20th term of the sequence.

8,

5,

2,

1,

...

an=

(Simplify your answer.)

a20=

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