`(5)/(1.2.3)+(7)/(3.4.5)+(9)/(5.6.7)+....=`

(5)/(3.6)+(5.7)/(3.6.9)+(5.7.9)/(3.6.9.12)-…....=

(3) / (6) + (3.5) / (6.9) + (3.5.7) / (6.9.1.2) + .... oo =

Sum of the series 1/(1*2*3)+5/(3*4*5)+9/(5*6*7 )+... is equal to

(2a-(7-5a))/(9a-(3+4a))=(7)/(6)

2 + (5)/(2!3) + (5.7)/(3!3^2) + (5.7.9)/(4!3^2) + …..oo =

Express the following as improper fractions: (a) (7)(3)/(4) (b) (5)(6)/(7) (c) (2)(5)/(6) (d) (10)(3)/(5) (e) (9) (3)/(7) (f) (8)(9)/(4)

(5)/(6) -: (6)/(7) xx ? - (8)/(9) -: 1 (2)/(5) -: (3)/(4) xx 3 (1)/(3) = 2(7)/(9)

(5)/(6)-:(6)/(7)xx?-(8)/(9)-:1(3)/(5)+(3)/(4)xx3(1)/(3)=2(7)/(9)(7)/(6)(b)(6)/(7)(c)1(d) None of these