Find the sum of infinite terms of the series : `3/(2*4)+5/(2*4*6)+7/(2*4*6*8)+9/(2*4*6*8*10)+...........`

Find the sum of infinite terms of the series : (3)/(2.4) + (5)/(1.4.6) + (7)/(2.4.6.8)+ (9)/(2.4.6.8.10)+……

Find the sum to n terms of the series 1 *2 *3 + 2*4*6 + 3*6*9+...

(a)Find the sum of "n" terms of the series 2 + 4 + 6 + 8 ......

Find the nth term and the sum of n terms of the series 1.2.4+2.3.5+3.4.6+....

Find the nth terms and the sum to n term of the series : 1.4.7+2.5.8+3.6.9 + ...

Find the sum of the following series (1)+(2+3)+(4+5+6)+(7+8+9+10)+…to n terms.