tim so huu ti a;b;c
biet a*b=2;b*c=3;a*c=54
tim a;b,c so huu ti biet
a*(a+b+c)=-12;b*(a+b+c)=18;c*(a+b+c)=30
tim cac so a,b,c biet rang :ab=c;bc-4a;ac=9b
cho f(x)= ax^2+bx+c voi a,b,c la cac so huu ti
chung to rang f(-2).f(3) be hon bang 0 . biet rang 13a+b+2c=0
tim cac so a,b,c biet rang
ab=c ; bc=4a ; ac=9b
Cho cac so huu ti x,y,z; x=a/b;y=c/d;z=m/n. Trong do m=a+c/2;n=b+d/2
Cho biet x khac y.Hãy so sánh x với y; y với z
tim cac so huu ti x ,y ,z biet 5xy=3, 5yz=4, 4xz=3
tong cac luy thua bac 3 cua 3 so huu ti la (-1009). Biet ti so giua so thu nhat va so thu 2 la 2/3, ti so giua so thu nhat va so thu 3 la 4/9. Tim 3 so do
tim 3 so duong a,b,c biet: ab=c; bc=4a; ac=9b
