The sum of the infinite series `5/(3^2xx7^2)+9/(7^2xx11^2)+13/(11^2xx15^2)+....` is

Sum of series 5/(3^2 7^2)+9/(7^2 11^2)+13/(11^2 15^2)+....oo is

The sum of the infinite terms of the series 5/(3^2. 7^2)+9/(7^2. 11^2)+13/(11^2. 15^2)..... is

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.

The sum of the series (1)/(3xx7)+(1)/(7xx11)+(1)/(11xx15)+.... is

Find the sum of the infinite series 1.3/2+ 3.5/2^2+ 5.7/2^3+ 7.9/2^4+.......oo

Find the sum of the infinite series (1.3)/(2)+(3.5)/(2^(2))+(5.7)/(2^(3))+(7.9)/(2^(4))+......oo

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 3xx1^2+5xx2^2+7xx3^2+ ………