1-:1+(3)/(4)

[4(1)/(5)-:{1(3)/(4)-(1)/(2)(3(1)/(2)-(1)/(4)-(1)/(6))}]

(1)/(4)" " (1)/(2) " "(3)/(4)" "1" "1(1)/(4)" "1(1)/(2)" "1(3)/(4) ?

The sum of the infinite series (1)/(2) ((1)/(3) + (1)/(4)) - (1)/(4)((1)/(3^(2)) + (1)/(4^(2))) + (1)/(6) ((1)/(3^(3)) + (1)/(4^(3))) - ...is equal to

(3)^(-1)+(6)^(-1)-:(3/4)^(-1)

9(3)/(4)-:[2(1)/(6)+{4(1)/(3)-(1(1)/(2)+1(3)/(4))}]

1+(1)/(4) + (1.3)/(4.8) + (1.3.5)/(4.8.12)+…...=

1-(1)/(4)+(1.3)/(4.8)-(1.3.5)/(4.8.12)+…..=

[1+(1)/(1+(1)/(1+(1)/(3)))]-:1(4)/(7) is equal to (a) 1 (b) 1(1)/(3)( c) 1(1)/(4) (d) 1(1)/(7)