a) -----|-----|-----|-----|-----------> -----|-----|-----|-----|-----|-----|-----|-----|-----|---------------------->
0 1 3/2 0 1 8/3
b)3/2=9/6
8/3=16/6
-----|----------|----------|----------|----------|----------|----------|----------|----------|----------|---------|----------|----------|----------|----------|----------|----------|------------------->
0 1 3/2=9/6 8/3=16/6
cho \(x=\frac{3}{2}y=\frac{8}{3}\)
a, Bieu dien x,y tren 2 truc so khac nhau
b,Bieu dien x,y tren 1 truc so
Cho x= 3/2 va y= 8/3
a) Bieu dien x;y tren hai truc so khac nhau
b) Bieu dien x;y tren cung 1 truc so
a,ve do thi cac ham so y=\(\frac{-3}{2}\)x va y=\(\frac{2}{3}\)x tren cung 1 he truc toa do
b,tren do thi ham so y=\(\frac{-3}{2}\)x lay diem A co hoanh do la 2.tren do thi ham so y=\(\frac{2}{3}\)x.Lay diem C co hoanh do la 3.do goc AOC,sau do bieu dien diem B tren mat phang toa do sao cho OABC la hinh vuong
bieu dien so huu ti 3/-4 tren truc so
Neu 3 cach viet cua so huu ti -3/5 va bieu dien no tren truc so
Chung to rang tren truc so, giua hai diem bieu dien hai so huu ti khac nhau bao gio cung co it nhat 1 diem huu ti nua.
bieu dien cac so 3/2 ; -5/2 ; 4/-3 tren truc so
ve do thi ham so sau cung 1 he truc oxy y=3x , y=-2x tinh dien tich tam giac tao boi 2 do thi ham so tren va duong thang y = 3/2
1) A= \(\frac{\frac{3}{4}-\frac{3}{11}+\frac{3}{13}}{\frac{5}{7}-\frac{5}{11}+\frac{5}{13}}+\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}}{\frac{5}{4}-\frac{5}{6}+\frac{5}{8}}\)
b) Cho 3 so x,y,z la 3 so khac 0 thoa man dieu kien :
\(\frac{y+z-x}{x}=\frac{z+x-y}{y}=\frac{x+y-z}{z}\)
Hay tinh gia tri bieu thuc:\(B=\left(1+\frac{x}{y}\right)\left(1+\frac{y}{z}\right)\left(1+\frac{z}{x}\right)\)