SOLUTION: An = -3, 2,7,12,17,….
a- Determine a138
b- Determine the first 40 terms of an
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Question 933368: An = -3, 2,7,12,17,….
a- Determine a138
b- Determine the first 40 terms of an
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
If , , , , ,
and so on, following the presumed pattern where ,
this is an arithmetic sequence,
with first term , and common difference .
For an arithmetic sequence,
term number {{n}}} is ,
and the sum of the first terms is .
So,
and .
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