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), denotes the sum of n terms of an AP, then the value of (S_(2n)-S_(n)) is equal to

If S_n , denotes the sum of n terms of an AP, then the value of (S_(2n)-S_n) is equal to

If S_n be the sum of the n consecutive terms of an A.P,find the value of S_(n+3)-3S_(n+2)+3S_(n+1)-Sn

If S_n, denotes the sum of n terms of an A.P. , then S_(n+3)-3S_(n+2)+3S_(n+1)-S_n=

If S_(n), denotes the sum of n terms of an A.P. then S_(n+3)-3S_(n+2)+3S_(n+1)-S_(n)=

If S_(n) , denotes the sum of first n terms of a A.P. then (S_(3n)-S_(n-1))/(S_(2n)-S_(2n-1)) is always equal to

If S_(n) denotes the sum of first n terms of an A.P., then (S_(3n)-S_(n-1))/(S_(2n)-S_(n-1)) is equal to

If S_(n) be the sum of n consecutive terms of an A.P. show that, S_(n+3) - 3S_(n+2) + 3S_(n+1) - S_(n) = 0

If S_n denotes the sum of first n terms of an A.P. and (S_(3n)-S_(n-1))/(S_(2n)-S_(2n-1))=31 , then the value of n is a. 21 b. 15 c.16 d. 19

If S_n denotes the sum of first n terms of an A.P. and (S_(3n)-S_(n-1))/(S_(2n)-S_(2n-1))=31 , then the value of n is 21 b. 15 c.16 d. 19