Let AP (a,d) denote the set of all the terms of an infinite ariothmetic progression with first term a and common difference `dgt0`
If `AP(1,3)nn(AP(1,2)nnAP(1,5)nnAP(1,7)=AP(a,d)`, then `21/d=`……..

Determine mean and standard deviation of first n terms of an A.P. whose first term is a and common difference is d.

The sum of 5th and 7th terms of an AP is 52 and the 10th term is 46 . Find the common difference of the AP.

S_(n) denots the sum of first n terms of an A.P. Its first term is a and common difference is d. If d= S_(n)-k S_(n-1) + S_(n-2) then k= ……….

For the AP: 3/2 ,1/2 , -1/2 ,-3/2 ......, write the first term a and common difference d.

Write first four terms of the AP. When the first term a and the common difference d are given as follows : a=-1 , d=(1)/2

Write first four terms of the AP. When the first term a and the common difference d are given as follows : a= -2 , d = 0

Write first four terms of the AP. When the first term a and the common difference d are given as follows : a = 4 , d = -3

Write first four terms of the AP. When the first term a and the common difference d are given as follows : a = 10 , d = 10

Let V_r denote the sum of the first r terms of an arithmetic progression (AP) whose first term is r and the common difference is (2r-1) . Let T_r=V_(r+1)-V_r-2 and Q_r =T_(r+1)-T_r for r=1,2 Which one of the following is a correct statement? (A) Q_1, Q_2, Q_3………….., are in A.P. with common difference 5 (B) Q_1, Q_2, Q_3………….., are in A.P. with common difference 6 (C) Q_1, Q_2, Q_3………….., are in A.P. with common difference 11 (D) Q_1=Q_2=Q_3

The 17th term of an AP exceeds its 10th term by 7. Find common difference .