The sum of first 10 terms and 20 terms of an AP are 120 and 440 respectively.
What is the common difference?

The sum of first 10 terms and 20 terms of an AP are 120 and 440 respectively. What is its first term ?

If the sums of the first 8 and 19 terms of an A.P. are 64 and 361 respectively, find (i) the common difference and (ii) the sum of n terms of the series.

The eighth term and 20th term of an A.P. are 22 and 46 respectively. Determine the first term, common difference and 17th term of it.

The first and the last terms of an A.P. are 17 and 350 respectively .if the common difference is 9 , how many terms are there and what is their sum ?

The first and the last terms of an AP are 17 and 350 respectively . If the common difference is 9, how many terms are there and what is their sum?

The first and the last terms of an A.P. are 17 and 350 respectively. If the common difference is 9, how many terms are there and what is their sum?

The first and the last terms of an A.P. are 17 and 350 respectively. If the common difference is 9, how many terms are there and what is their sum?