Question

35)- Gasiti a,b,c , stiind ca {a,b,c} sunt invers proportionale cu {0,5; 0,(3), ; 0,1(6)} stiind ca a+2c=70
Va rog am nevoie urgent !!!!!

Answer 1

a•0,5=b•0,(3)=c•0,1(6)=k
a•1/2=b•1/3=c•15/90=k
a/2=b/3=c•1/6=k
a/2=b/3=c/6=k
a=2k
b=3k
c=6k
a+2c=70
2k+12k=14k=70=>k=5;
a=10
b=15
c=30