[" 8.If "f(2n-1),(3n+2),(6n-1)" are mree consecueive "],[" terms of an "AP" ,then the value of "n" is - "]

If t_(n)" is the " n^(th) term of an A.P. then the value of t_(n+1) -t_(n-1) is ……

if nth term of an AP is 3n+2 then find the sum n terms.

Find the value of n if 2n+1,n^(2)+n+1,3n^(2)-3n+3 are consecutive terms of an AP

If S_n , be the sum of n terms of an A.P ; the value of S_n-2S_(n-1)+ S_(n-2) , is

If S_(n), be the sum of n terms of an A.P; the value of S_(n)-2S_(n-1)+S_(n-2), is

If in the expansion of (1+x)^(n) the coefficient of 2nd, 3rd and 4th terms are in A.P., then the value of n is-

If the numbers (2n-1), (3n+2) and (6n-1) are in AP, find n and hence find these numbers.

The sum of n terms of an A.P is 3n^(2) +n . Then 8^(th) term of the A.P is