the third term of an `A.P.` is `18` and seventh term if `30` then find sum of `17` terms

If third term of an A.P. is 18 and seventh term is 30, find the series

The third term of an A.P. is 10 and seventh term is 22. Find the A.P.

If the third term of an A.P. is 5 and the seventh terms is 9, find the 17th term.

If in A.P., 3rd term is 18 and 7 term is 30, then find sum of its first 17 terms

If the sum of the first 10 terms of an A.P. is 1,200 and First term is 30. Then find the 6^(th) term.

The third term of an A.P. is 7 and the seventh term exceeds three times the third term by 2. Find the first term, the common difference and the sum of first 20 terms.

The third term of an A.P. is 7 and the seventh term exceeds three times the third term by 2. Find the first term, the common difference and the sum of first 20 terms.