Question

determinati x supra x+y stiind ca x supra y =0,(6) si x,y apartin R​

Answer 1

Răspuns:

X/(x+y)=2/5........

Answer 2

Răspuns:

Explicație pas cu pas:

x/y = 0,(6) = 6/9 = (6:3)/(9:3) = 2/3

x/y = 2/3 ⇒   3 x = 2 y ⇒   x/2 = y/3 = k → coeficient de proportionalitate

x = 2 k    si   y = 3 k

x/(x+y) =  2 k /(2k+3k) = 2k/5k = 2/5

______________________________

sau:   x/y = 2/3 ⇒ y = 3 x/2

x / (x+3x/2) = x : ( 2x/2 + 3x/2) = x : (5x/2 ) = x ×(2/5x) = 2/5