Asked by Rachel
The fifth term of an arithmetic sequence is 22 and the 15th term is 62. Find the 100th term and the sum of the first 60 terms
Answers
Answered by
Steve
T15-T5 = 10d = 40
so, d = 4
Now you can find T1 and T60
Then the sum is 30(T1+T60)
so, d = 4
Now you can find T1 and T60
Then the sum is 30(T1+T60)
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