`1/20+1/20+1/42+1/56+1/72+1/90+1/110+1/132` किसके बराबर है।

1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132 is equal to

1/16x+1/15y=9/20; 1/20x-1/27y=4/45

1/16x+1/15y=9/20; 1/20x-1/27y=4/45

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)

(1)/(20)+(1)/(30)+(1)/(42)+(1)/(56)+(1)/(72)+(1)/(90)+(1)/(110)+(1)/(132)= ?

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)(7)/(8)( b) (11)/(12)(c)(15)/(16) (d) (17)/(18)