4th term, 10th term and nth term of an A.P. are 7, 25, 58 respectively. Find 1st term, C.D. and the value of n.

The 4rth term and 15th term of an A.P is 22 and 66 respectively. Find the first term and the common difference.

The fourth term and eighth term of an A.P. are 2 and 10 respectively. Determine the A.P. and its 11th term.

Find the 20th term and nth term of the G.P 5/2,5/4,5/8,….

If the mth term and nth term of an A.P. are respectively n and m show that the (m + n)th term is zero and pth term is m + n-p .

The first term and last term of an A.P. are respectively 1 and 157. If the sum is 3160 find the number of terms.

The fourth and seventh term of an G.P are 1 and 1/8 respectively.Find the series and the 9th term 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 7th term and 14 term of an A.P are - 9 and - 23 respectively. Determine the first term and common difference. which term of the A.P is -25

If the first terms, second term and the last term of an A.P. are respectively a,b and c.Prove that the sum of the series is [(a+c)(b+c-2a)]/[2(b-a)] .

The fifth and the ninth terms of an A.P are 11 and 7 respectively.Find the fourteen term of the series.Also find the sum of the first sixteen terms of the A.P.