Question

me ajuda por favor !

Answer 1

K= ((2^-1)+(3^-1) / ((1+5.(4^-1))^1/2)
K= (1/2+1/3) / ((1+5.(1/4))^1/2)
K= (5/6) / (1+5/4)^1/2
K= (5/6) / (9/4)^1/2
K= (5/6) / (3/2) = (5/6).(2/3)= 10/18= (10/18).(0,5/0,5)= 5/9