Evaluate : `(-12)/5+(-7)/(20)+3/(14)+1/7+(-1)/(10)`

Evaluate: f. 12 (1)/(2) -3 (9)/(14) + 4 (5)/(7)

Evaluate: |(3)/(5)xx(-1)/(6)|+|-(2)/(14)xx(7)/(10)|

Evaluate : (i) (12!)/(10!) (ii) (14!)/(10!5!) (iii) (1)/(4!)+(1)/(5!)+(1)/(6!)+(1)/(7!)

Evaluate : (i) (12!)/(10!) (ii) (14!)/(10!5!) (iii) (1)/(4!)+(1)/(5!)+(1)/(6!)+(1)/(7!)

Using suitable rearrangement and find the sum: -5+(7)/(10) +(3)/(7) +(-3) +(5)/(14) +(-4)/(5)

Find the sum to n terms of each of the following series : (1)/(1.4) + (1)/(4.7) + (1)/(7.10)+…

Find the sum of the series : (1)/(1.4)+(1)/(4.7)+(1)/(7.10)+.... to n terms.

Evaluate: 7/20 times of 5/14

[[1,0,-13,4,50,-6,-7]]=[[(1)/(10),(3)/(10),(1)/(5)(21)/(20),-(7)/(20),-(2)/(5)-(9)/(10),(3)/(10),(1)/(5)]]