Question
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
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)
Related Questions
The fifth term of an arithmetic sequence is 22 and the 15th term is 62. Find the 100th term and the...
In an arithmetic sequence , the 9th term is twice the 3rd term and 15th term is 80. Find the common...
The 10 th term of an arithmetic sequence is equal to the sum of 40 and 15th term. If the 15th term i...