Question

determinati nr a b c direct proportionale cu nr 2 3 si 4 stind ca a+ b + c = 27

Answer 1

{a,b,c} d.p. {2,3,4}
a/2=3/b=4/c=k
=>a=2k
=>b=3k
=>c=4k
a+b+c=2k+3k+4k=27
=>9k=27
k=27:9=3
=>a=2k=2×3=6
=>b=3k=3×3=9
=>c=4k=4×3=12

Verificare: a+b+c=6+9+12=27