Răspunsuri

2014-04-18T09:17:23+03:00
A/5=b/4=c/2=d/3=k
a=5k
b=4k
c=2k
d=3k
4k*2k=4*3k
8k²=12k( impartim totul prin 4k)
2k=3
k=3/2
a=15/2
b=12/2
c=3
d=9/2
a+b+c+d=36/2+3=18+3=21
D21=(1,3,7,21)

2014-04-18T10:24:02+03:00
A/5=b/4=c/2=d/3=k
a=5k
b=4k
c=2k
d=3k
4k*2k=4*3k
8k²=12k( impartim totul prin 4k)
2k=3
k=3/2
a=15/2
b=12/2
c=3
d=9/2
a+b+c+d=36/2+3=18+3=21
D21=(1,3,7,21)