SOLUTION: Write a formula for the general term (the nth term) of each arithmetic sequence. Do not use a recursion formula. Then use formula for a n to find a20, the 20th term of the sequen

Algebra ->  Sequences-and-series -> SOLUTION: Write a formula for the general term (the nth term) of each arithmetic sequence. Do not use a recursion formula. Then use formula for a n to find a20, the 20th term of the sequen      Log On


   

Question 481824: Write a formula for the general term (the nth term) of each arithmetic sequence. Do not use a recursion formula. Then use formula for a n to find a20, the 20th term of the sequence. 2,7,12,17....
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

arithmetic sequence: {2,7,12,17,...}  d = 5

a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad

a%5B20%5D=2%2B%2819%29%2A5+=+highlight%2897%29