กลางภาค2ม.4

{(1,a),(1,b),(1,c),(2,a),(2,b),(2,c)}

{(1,a),(1,b),(2,a),(2,c)}

{(a,1),(a,2),(b,1),(b,2),(c,1),(c,2)}

{(a,1),(a,2),(b,1),(b,2),(c,1)}

$$D_r=R$$

$$D_r=\left[-4,4\right]$$

$$R_r=R$$

$$R_r=\left[-4,4\right]$$

{(x,y) $$\in R\times R$$ Iy = 3x+4}

{(x,y) $$\in R\times R$$ Iy= $$\frac{x-4}{3}$$ }

{(x,y) $$\in R\times R$$ I

y=3x-4}

{(x,y) $$\in R\times R$$ I

y = $$\frac{x+y}{3}$$

1

5

9

49

2

0

$$\sqrt[]{2}$$

1

-4

4

-2

2

0

2

-2

1

หาค่าไม่ได้

0

1

2

(1,2) $$\in A\times B$$

(3,4) $$\in B\times C$$

C $$\times$$ C = {(3,4),(4,3)}

$$n\left(\left(A\cap B\right)\times\left(B\cap C\right)\right)=1$$

{(1,2),(2,3)}

{(1,2),(2,3),(3,4),(1,4)}

{(1,4),(2,3),(3,3)}

{(1,4),(2,2)}