1、 1 2016 11 30 1. 2. ,y x ( ) A.2xy+x 2 =1 B.y 2 =ax+2 C.y=x 2 -2 D.x 2 -y 2 +4=0 3. 3 4 0 40 13 2 x x A.15 12 B.12 C.15 D. 4. y=ax+b y=ax 2 +bx+c 5. 5cm O AB=6cm OC AB C OC= A 3cm B 4cm C 5cm D 6cm 6. y=-x 2 +mx+n -1 - 3 ) m n A.2,4 B.-2,-4 C.2,-4 D.-2,0 7 OAB O 80 OCD AOB 45 AOD 55 45 40 35 8. P 2
2、3 P / P / 9. x mx 2 2x 1 0 y (m 1)x m 2 A B C D 10. O ACB AOC 108 o , D AB BD BC , D = 24 11. y=-2x+x 2 7 . 12 2 10 x ax a 13. y=2x 2 -1 l 4 . 14. A B C y=x 2 -2x-3 y x ABC . 15 PA PB O AB MN O C PB N ; . = PA 75cm PMN 16. ABC ABC=50 ACB=75 , O ABC BOC . 66 17. 16 (1) 25 1 4 2 x (2) 0 3 5 2 2 x x (3
3、) 0 1 6 2 x x (4) 7 8 7 x x x N M B P O A C D C B A O 3 18 9 ABC A(-2 3) B(-6 0) C(-1 0) (1) A y (2) ABC O 180 B (3) A B C D 19 9 5cm AB 8cm 1 CD 2 AOD 50 20 10 ABC C=90 , AD BAC O AB , OA O D 1 BC O 2 BD=5 CD=3 AC O A C D B 4 21. 10 20 40 1 2 1200 22. 12 2 y ax bx c A B C . 1 A B C ; 3 2 ; 3 3 x y 0 3 -1 4 A B 5 O x y C 5 6 7 8
