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2012
(120 150 ) 10 5 50 1 a > b, c R ߧ 1 1 A . ac > bc B .a ?c > b ?c C . a2 > b2 D. < a b 2. A(2 , m) B (m , 5) 2 x ? y + 1 = 0 m = A.0 B .1 C .2 D .3 3 x + ay ? a = 0 ax ? (2a ? 3) y ? 1 = 0 a A.2 B . ?3 1 C .20 D .1 0 4. l1 : x ? 2 y + 2 = 0, l 2 : 2 x ? y ? 2 = 0 A.y=2x B.y=x C.y=2x+1 5 P12 3x +4y =1 A 1 B .2 C .3 D .4 D.y=x+1





1 4 6 x y ( x + y ) ( + ) ) x y A 15 B 12 C 9 D8 7. ( ) A. y = x ( A. ) B . x2 ? y 2 = 0 C . y = ?x

(

)

D. y = x

8 l1 l2 Ҧ x 2 ? 4 x + 1 = 0 l1 l2


3

B.


4

C.


6

D.


8

9 O l (2,?1) l A 2 x ? y + 5 = 0 B x ? 2 y + 5 = 0 C 2 x + y ? 3 = 0 D 2 x ? y ? 5 = 0

1

l : y = kx ? 3 2 x + 3 y ? 6 = 0 l Ҧ
A .[ , ) 6 3



B. ( , ) 6 2



C. ( , ) 3 2



D.

[ , ] 6 2



10 x > 0 y > 0 x + y = 1 x + y a a A
2 2



B 2

C 2

D 2 2

5 5 25 ax 11. x < 1 { x x < 1 x > 2} a = x ?1 12 3 x + 2 y ? 3 = 0 6 x + my + 1 = 0 13 P11 3x +4y =2
?x + 2 y ? 5 0 y ? 14 x,y ? x 1, y 0 , x ?x + 2 y ? 3 0 ?

15 M-10 N10 P PM ? PN =2 y=x y= y=x-1 y=1 y= x+1
1 2

1 x + 1 , 2

6 75 16( 13 ) 1 A30 2x+y5=0 2 B21 5x+2y+3=0 45

2

17 13 M F(4,0) x+4=0 M

18. 13 x
3x 1 x ?4
2

19 12 l

y = x ? 1 C: (x?3)2 +y2 =4 AB |AB|.

20 12 7 6 9 1 2

3 4 4 3

21 12 xoy , A(1,1) B (3,3) x P APB

3

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