1、 2018 120 150 10 4 40 1 A y=3x 1 B y=ax 2 +bx+c C y=2t 2 +1 D y=x 2 + 2. 0 1 4 2 x x A. 3 2 2 x B. 3 2 2 x C. 5 2 2 x D. 5 2 2 x 3 3 ) 1 ( 2 x y 1 3 A 2 ) 2 ( x y B 6 ) 2 ( 2 x y C 6 2 x y D 2 x y 4. 3 4 x 2 12x+35=0 A.14 B.12 C.12 14 D. 5 y=x 2 x 2 x m 0 m 2 m+2016 A 2015 B 2016 C 2017 D 2018 6. 81
2、 A 10 B 19 C 9.5 D 20 7. y=3 x+1 2 8 A 1 y1 B 2 y2 C 2 y3 y1 y2 y3 A y1 y2 y3 B y2 y1 y3 C y3 y1 y2 D y3 y2 y1 8. y= x m 2 + m+1 m A m 1 B m 0 C m 1 D 1 m 0 9 20cm 30cm 2 1 A 1cm B 1.5cm C 2cm D 2.5cm 10 y=mx+m y= mx 2 +2x+2 m m 0 A B C D 4 5 20 11 y= 4 1 x-2 2 +3 y 12. kx 2 6x+1=0 k 13. y ax 2 bx c
3、 y x 2 4x 3 y y ax 2 bx c _ 14 a b 53 5 3 5 3=5 3 3 2 =6 x1 x2 x 2 6x+8=0 x1 x2= 4 8 32 15. : x+1 x+2 =2x+4 16. (x 1)(x 1) 2 2x 17. A( 1,0) B(3,0) 8 . 18. , ABC B AB=5cm BC=7cm P A AB B 1cm/s Q B BC C 2cm/s 1 P Q A B PBQ 4cm 2 2 1 PBQ 7 2 , 10 20 19 x 0 1 2 2 2 m x m x . 1 m 2 1 m . 20. 2016 3 5 10 12.1 (1) (2) 0.6 21 2016 6 2 , 12 24 21. 2 4 100 0.1 20 260 (1) x _ ( x ) (2) 300 22 y 1 2x 2 x 5 2 . 1 y 1 2x 2 x 5 2 . y=a (x-h)2 +k 2 ( ) 3 . 14 23. 15 y1( ) x( ) y1 2x y2( ) x( ) ( OA A AB x ) (1) y2 x (2) W( ) t( ) (3) ( 2 w t w )
