" If "s_(n)=3n^(2)+2n" the "t_(n)=?

If S_(n)=3n^(2)+2n , then write a_(2)

If S_(n) = 5n^(2) + 3n, then 2^(nd) term is …………… .

For sequence (t_(n)), if S_(n)=5(2^(n)-1) then t_(n)= . . .

S_(n) denote the sum of the first n terms of an A.P. If S_(2n)=3S_(n) , then S_(3n):S_(n) is equal to

If S_(n) denotes sum of first n tem of a series and if S_(n+2)-S_(n)=n^(2) then S_(20) is ("given that" T_(1)+T_(2)=0)

If S_(n) denotes sum of first n tem of a series and if S_(n+2)-S_(n)=n^(2) then S_(20) is ("given that" T_(1)+T_(2)=0)

If S_(n) denotes the sum of first n terms of an A.P. and S_(2n)= 3S_(n) , then (S_(3n))/(S_(n))=

Let S_(n) be the sum of the first n terms of an arithmetic progression .If S_(3n)=3S_(2n) , then the value of (S_(4n))/(S_(2n)) is :