Question

deteminati numerele x,y,z stiind ca este inversul proportionale cu 0,5 0,(3) ,0,25 si ca x+y+z=36

Answer 1

{x,y,z}i.p.{0,5; 0,(3); 0,25}
0,5=5/10=1/2
0,(3)=3/9=1/3
0,25=25/100=1/4
Invers proportionale inseamna
x ori 1/2=x/2=k=>x=2k
y ori 1/3=y/3=k=>y=3k
z ori 1/4=z/4=k=>z=4k
x+y+z=36
2k+3k+4k=36
9k=36
k=4
x=2*4=8
y=3*4=12
z=4*4=16
Bafta la scoala! ;D