Question

a si b sunt direct proportionale cu 2,3,5 si a*b= 270. Calculati a si b

Answer 1

a/2=b/3=k
a/2=k⇒a=2k
b/3=k⇒b=3k
2k·3k=270
6k²=270
k²=45
k=3√5
a=2·3√5=6√5
b=3·3√5=9√5