Find the sum of the following `1/9+1/6+1/12+1/20+1/30+1/42+1/56+1/72`

Find the sum of the following AP s:(iv)1/15,1/12,1/10,……to 12 terms.

Find the sum of the following: 1.2+2.3+…..+n(n+1)

Find the sum of the infinite series (1)/(9) + (1)/(18) +(1)/(30) +(1)/(45)+(1)/(63)+cdots.

What is the sum of 1 1/2+4 1/6+7 1/12+10 1/20 .....up to 20 terms? 1 1/2+4 1/6+7 1/12+10 1/2 .....के 20 पदों तक का योग क्या है?

Find the sum: 1 1/6 + 3 1/6

Find the sum : (1)/(2) + (1)/(6) + (1)/(12) + (1)/(20) + (1)/(30 ) + (1)/(42) + (1)/(56) + (1)/(72) + (1)/(90) + (1)/(110) + (1)/(132)

Find the sum of the infinte series (1)/(9)+(1)/(18)+(1)/(30)+(1)/(45)+(1)/(63)+…

Find the sum of the infinte series (1)/(9)+(1)/(18)+(1)/(30)+(1)/(45)+(1)/(63)+…