Find the sum to `n` terms of the series `3//(1^2xx2^2)+5//(2^2xx3^2)+7//(3^2xx4^2)+dot`

Find the sum to n terms of the series 3//(1^(2) xx2^(2))+5//(2^(2)xx3^(2))+7//(3^(2)xx4^(2))+ cdots .

Find the sum to n terms of the series 3/(1^(2)xx2^(2))+5/(2^(2)xx3^(2))+7/(3^(2)xx4^(2))+

Finds the sum of first n terms of the series 3/(1^2xx2^2)+5/(2^2xx3^2)+7/(3^2xx4^2)+...... and hence deduce the sum of infinity.

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

Find the sum to n terms of the series 3xx1^2+5xx2^2+7xx3^2+ ………

Find the sum to n terms of the series 3xx1^2+5xx2^2+7xx3^2+ ……..

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

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

The sum of 10 terms of the series (3)/(1^(2)xx2^(2))+(5)/(2^(2)xx3^(2))+(7)/(3^(2)xx4^(2))+… is

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