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

Find the value of 1 + 1/( 1 + 1/6 )

Find the value of 1/(1-1/(1-1/(1-1/x)))

Find the value of (1-2sin^(2)30^(@)) .

Find the value of 1 + 1 / ( 1 + 1/( 1 + 7/5 ) is

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)

Find the value of [(1/2)^(-1) + (1/3)^(-1)]^(-1)

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

Find the value of 1 + 1/( 1 + 1/ ( 1 + 1/ 9 )   is