Question

determinati nr a,b si c stiind ca sunt direct proportionale cu 3,4 si 5 iarprodusul lor este 480

Answer 1

{a, b, c}--->d.p ->{3, 4, 5}=> a/3=b/4=c/5=k
a/3=k=>a=3k
b/4=k=>b=4k
c/5=k=>c=5k
3k*4k*5k=480
60k³=480
k³=480/60
k=8=>k=2
=>a=6;
     b=8;
     c=10.