[" The sum of the first n terms of the series "],[1^(2)+2.2^(2)+3^(3)+2.4^(2)+5^(2)+2.6^(2)+...." is "(" "In."-1%)/(2)" ,when "n" is even."],[" When "n" is odd,the sum is "]

The sum of the first n terms of the series 1^(2)+2.2^(2)+3^(2)+2.4^(2)+5^(2)+2.6^(2)+... is

The sum of first n terms of the series 1^(2) + 2.2^(2) +3^(2) + 2. 4^(2) + 5^(2) + 2. 6^(2) + "........." is ( n ( n + 1)^(2))/( 2) when n is even. When, n is odd, the sum is :

The sum of n terms of the series 1^(2)-2^(2)+3^(2)-4^(2)+5^(2)-6^(2)+... is

The sum of first n terms of the series 1_(2) + 2.2^(2) + 3^(2) + 2.4^(2) + 5^(2) + 2.6^(2) + ...... is (n(n + 1)^(2))/4 when n is even. When n odd the sum is

The sum of n terms of the series 1^(2)+2.2^(2)+3^(2)+2.4^(2)+5^(2)+2.6^(2)+... is (n(n+1)^(2))/(2) when n is even.when n is odd the sum is

Find the sum of the first n terms of the series 1^3+3.2^2+3^3+3.4^2+5^2+3.6^2+.... when n is odd

Find the sum of the first n terms of the series 1^3+3.2^2+3^3+3.4^2+5^2+3.6^2+.... when n is even

Sum of n terms the series: 1^(2)-2^(2)+3^(2)-4^(2)+5^(2)-6^(2)+

The sum to n term of the series 1(1!)+2(2!)+3(3!)+