Find the sum to `n` terms of the sequence
`1.3.2^2+2.4.3^2+3.5.4^2+....`

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

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

Find the sum to n terms of the series 1.2.3+2.3.4+3.4.5+…

Find the sum of n terms of the series 1.2^(2)+2.3^(2)+3.4^(2)+

Find the nth term and the sum to n terms of the series 1.2+ 2.3 +3.4 + ...

Find the sum to n terms of the series 1*2^(2)+2*3^(2)+3*4^(2)+...

Find the sum of n terms of the series 1^3+3.2^2+3^3+3.4^2+5^3+3.6^2+....... when (i)n is odd (ii)n is even

Find the sum of n terms of the series 1^3+3.2^2+3^3+3.4^2+5^3+3.6^2+....... when (i)n is odd (ii)n is even

Find the sum of n terms of the series 1^3+3.2^2+3^3+3.4^2+5^3+3.6^2+....... when (i)n is odd (ii)n is even