Question

The sum of 5 th and 26 th term of an arithmetic sequence is 50 and the no of termsof the sequence is 30.

a)Find the sum of 1 st and 30 th term of the sequence.

b)If the 10 th term is 11 ,find the 21 st term.

c)Find the sum of 30 terms of the sequence.
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Answer 1

Answer:

I don't know this answer.

sorry.