Find the sum to n terms of the series , 5+11+19+29+41…

Find the sum to n terms of the series 3 xx 8 + 6 xx 11 + 9 xx 14 + . . . . . .

Find the sum to n terms of the series . 3 xx 1^(2) + 5 xx 2^(2) + 7 xx 3^(2) + . . . . . .

Find the sum to n terms of the series , (1)/(1.2)+(1)/(2.3)+(1)/(3.4)+.... ?

Find the sum of n terms of the series 1. 2. 3+2. 3. 4+3. 4. 5+

Find the sum to n terms of the series (1)/(1xx2) +(1)/(2xx3)+(1)/(3xx4) + . . . . . .

Find the sum to n terms of each of the series in 5^2 + 6^2 + 7^2 + ... + 20^(2)

Find the sum upto n terms of the series 1+4+7+10+13+16+"...." .

Find the sum to n terms of the series (1)/(1*3*5*7*9)+(1)/(3*5*7*9*11)+(1)/(5*7*9*11*13)+"......" . Also, find the sum to infinty terms.

Find the sum to n terms of the series in whose n^(th) terms is given by n(n+1)(n+4)

Find the sum to n terms of the series in whose n^(th) terms is given by n^2+2^n