In an AP, the first term is 2 and the sum of the first five terms is one fourth the sum of the next five terms.
Find the `20^th`term.

In an AP, the first term is 2 and the sum of the first five terms is one fourth the sum of the next five terms. Find the common dfference.

In an A.P, the first term is 2 and the sum of the first five terms is one-fourth of the next five terms. Show that 20^(th) term is -112

In an AP, the first term is 2 and the sum of first five terms is 5. Then the 31st term is

In an A.P. of which a is the first term if the sum of the first p terms is zero then the sum of the next q terms is

The third term of a GP is 4. Find the product of the first five terms.

Sum of the first 4 terms of an arithmetic sequence is 72. Sum of the first 9 terms is also 72. Find the sum of the first five terms.

In an A.P., the first term is 3 and the last term is 17. The sum of all the terms in the sequence is 70. Then the number of terms in the arithmetic sequence is

Find the sum of the first n-terms of the series. 2+22+222+…..

Find the sum of the first 10 terms of the AP which is (2n-3)/6 .

Write the first three terms of each of the arithmetic sequences described below: i) First term 30, the sum of the first three terms is 300 ii) First term 30, the sum of the first.four terms is 300 iii) First term 30 , the sum of the, first five terms is 300 iv) First term 30 , the sum of the first six terms is 300