1、 1 2017 12 ( 150 120 ) ( 6 3 18 ) 1 x x 2 +mx 6=0 2 m ( ) A 1 B 1 C 2 D 5 2 ( ) A B 6 C 10 D 3 7 3 7 ( ) A B C D 4 ( ) A AC AB CD BC B CD BC AD AC C AC 2 D CD 2 4 5 6 5 AB C AB ( ) A B C D 6 , , , AD DC ( ) A 3 3B 2 2C 1 2 D 1 3 ( 10 3 30 ) 7 x x 2 1 2 8 5 3 y x x y x y = 2 D P M C B A 9 0 1 4 2 2 x
2、 x 1 x 2 x 2 2 1 1 x x x x 10 O C OB OC 6 C , 2 2 OA 11 , sinA= 13 5 tanB 12 A B C 3 25 AB 13 1 2 3 4 5 2 12 13 14 15 16 10 12 14 15 14 i=1 3 10m 15 AB=AC D M AC AD BM G S BD S MDC 16 C AB=AC=5 BC=6 M BC BM=4 P AB PM PM D B AD AD ( 10 102 ) 17 ( 8 ) (1) 0 6 2 2 x x ( ) (2) 1 2 1 12 3 60 sin 4 1 18 (
3、 8 ) 3 1 9 6 1 3 2 2 2 x x x x x x x 0 1 2 x C B O A 3 . 19 ( 10 ) . (1) ( ) (2) B (3) 500 480 160cm 20 ( 10 ) 3 1 2 3 2 4 5 (1) (2) 3 21 ( 10 ) BC A B A C D (A D C ) B A D 36m BC( ) (cm) A x 150 B x 155 C x 160 D x 165 E x A B C D E 5% 15% 30% 20% /cm E D C B A 14 12 8 4 2 0 4 22 ( 10 ) AD A D O AB
4、 AB AC E F (1) BC (2) 2 AC=3 BD 23 ( 10 ) 20 / 90 y( ) x( / ) x( / ) 50 60 70 80 y( ) 100 90 80 70 (1) y x (2) 4000 24 ( 10 ) A( 1 0) ( 0) y ax b a ( 0) k yk x P Q P B Q ( 3, ) m (1) m (2) (3) x D D C O D 25 ( 12 ) ABCD AB=4 F BC ( B C ) DF F FEHG E G AB FD (1) BEF CFD (2) x BF 5 BE ( x ) BE 2 3 x (
5、3) AH AH BAD CF 26 ( 14 ) x 2 ( 1) 0 x k x k ( k ) (1) (2) 01 k n n m m , m n (3) (2) 1 y kx x C x ( ,0) Am (n,0) B , k k 6 2016.12.2 6 3 18 1. A 2.D 3.A 4.C 5.B 6.D 10 3 30 7. 8. 4 9. 2 5 10. 11. 12. 13.2 14. 15. 16. 10 102 17 8 1 2 , 2 3 2 1 x x 4 2 4 18 8 ) 3 )( 1 ( 1 x x 6 5 1 2 19 10 1 D 2 2 12 4 3 371 4 20 10 1 5 2 5 21 10 m 22. 10 1 5 2 5 23 10 1 4 2 70 3 2 1 24. 10 1 3 2 9 3 3 1,0 4,0 4 25. 12 1 4 2 BE= 2 2 3 3+1 26. 14 1 1+3 2 m=-k,n=1 4 3 1 2 7 3
