Question

cat de repede se poateee ex. 16! intrebarea are 100 de puncte.

Answer 1

Am atasat rezolvarea

Answer 2

{x, y, z} d.p{ 4/5,5/2,3/4}
x+y+z=1
x/4/5=y/5/2=z/3/4=k
x/0,8=y/2,5=z/0,75=k
x=0,8k
y=2,5k
z=0,75k
0,8k+2,5k+0,75k=1
4,05k=1
k=1:4,05
k=1:81/20
k=1×20/81
k=20/81
x=0,8k=0,8×20/81= 8/10×20/81=16/81
y=2,5k=2,5×20/81=25/10×20/81 =50/81
z=0,75k=0,75×20/81=75/100×20/81=5/27

Verificare : 16/81+50/81+5/27= 16+50+15/81=81/81=1