Asked by Keonn'a
The following problem refers to an arithmetic sequence. If the seventh term is 9 and the fourteenth term is 16, find the term a1, the common difference
d, and then find a27 and S27
d, and then find a27 and S27
Answers
Answered by
Steve
since there are 7 terms from a7 to a14, and the difference is 7, d=1
so, a1=3
Now you can easily find a27, and of course,
S27 = 27/2 (a1+a27))
so, a1=3
Now you can easily find a27, and of course,
S27 = 27/2 (a1+a27))
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