Find the value of: `1/(30)+1/(42)+1/(56)+1/(72)+1/(90)+1/(110)` .

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)

the value of (1)/(6)+(1)/(12)+(1)/(20)+--------+(1)/(90)

What is the value of (1)/(30.31) +(1)/(31.32)+(1)/(32.33) + …+ (1)/(89.90) ?

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)

What is the answer (1)/(6) +(1)/(12) +(1)/(20) +(1)/(30) +(1)/(42) +(1)/(56) ?

Find the values of frac(1)(2) + frac(1)(6) + frac(1)(20)+frac(1)(30)