Find the sum of the series `1^2+3^2+5^2+ ton` terms.

Find the sum of the series 1 . 3^(2) + 2.5 ^(2) + 3.7^(2) +…+ to n terms

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

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

Find the sum of the following series up to n terms : (1^(3))/(1)+(1^(3)+2^(2))/(1+3)+(1^(3)+2^(3)+3^(3))/(1+3+5)+...

Find the sum of the following series to n term: 3.1^2+5.2^2+7.3^2+……..

Find the sum of the following series to n term: 1. 2. 5+2. 3. 6+3. 4. 7+..........

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