SOLUTION: the sum of the second and sixth terms of an arithmetic sequence is 4. the third term is more than the 11th term. 1. determine the first three terms in the sequence. 2. determin

Algebra ->  Sequences-and-series -> SOLUTION: the sum of the second and sixth terms of an arithmetic sequence is 4. the third term is more than the 11th term. 1. determine the first three terms in the sequence. 2. determin      Log On


   

Question 1064519: the sum of the second and sixth terms of an arithmetic sequence is 4. the third term is more than the 11th term.
1. determine the first three terms in the sequence.
2. determine a formula for the nth term of the sequence.
3. determine the 17th term in the sequence.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a%5B4%5D=a%5B1%5D%2B3d
a%5B6%5D=a%5B1%5D%2B6d
.
.
.
a%5B4%5D%2Ba%5B6%5D=a%5B1%5D%2B3d%2Ba%5B1%5D%2B6d
a%5B4%5D%2Ba%5B6%5D=2a%5B1%5D%2B9d
2a%5B1%5D%2B9d=4
.
.
a%5B3%5D=a%5B1%5D%2B2d
a%5B11%5D=a%5B1%5D%2B10d
a%5B3%5D%3Ea%5B11%5D
a%5B1%5D%2B2d%3Ea%5B1%5D%2B10d
-8d%3E0
d%3C0
.
.
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