1、 2017 3 30 1 1 1 3 2 A 1 1 B 1 2 C 3 2 D 1 2 2 a b 2 A B C D 3 7000 7000 A 70 10 2B 7 10 3C 0.7 10 4D 7 10 44 A B C D 5 6 A B C D 6 y= x+a y=x+b 2 8 a b A 2 B 4 C 6 D 8 7 10 m 3 0.3 0.4 0.5 0.6 0.7 2 2 4 1 1 10 m 3 A 0.47 0.5 B 0.5 0.5 C 0.47 4 D 0.5 4 8 ABCD AC AD BC E F CE CED 6 ABCD A 6 B 12 C 18
2、 D 24 9 y=ax 2 +bx+c a 0 a 0 c 0 b 2 4ac 0 0 A B C D 10 ABCD AD BC ABC+ BC=2AD AB BC DC S 1 S 2 S 3 S 1 =3 S 3 =9 S 2 A 12 B 18 C 24 D 48 4 20 11 x 12 x 3 x 9 =0 13 ABCDEF O O 6 OM 14 10 100 30 15 ABCD AB=2 AD=3 E AB F AD AEF EF 10 100 16 x x+2y x+1 2 +2x =x 2 +2xy x 2 +2x+1+2x =2xy+4x+1 1 2 17 2017
3、 6 2 2016 2016 1 a= b= 2 3 1 5 142 94% 2016 18 ABC D E BC AB DE F EF=2DF CE AF 1 AF=CE 2 ACEF 19 2017 5 25 1 6 6 6 5 1 1 2 4 20 C C 17 B A 15 A BAD 21 6 3 2520 23 4 1.5 1 2 5 22 C D O AB=4 AD AC DE AB E DE AC F 1 AFE 3 23 y=2x+6 y= k 0 A 1 m x B x y=n 0 n 6 M AB N BM 1 m 2 y=n y n BMN 24 1 ABCD AB D
4、C E BC AE BAD AB AD DC AE DC F AEB FEC AB=FC AB AD DC AB AD DC 2 ABCD AB DC AF DC F E BC AE BAF AB AF CF 3 AB CF AE BC E BE EC=2 3 D AE EDF= BAE AB DF CF 25 y=ax 2 +bx a 0 1 2 0 1 3 2 y= 2x b 3 A 1 A 2 A n y= 2x 1 2 3 n n n 12 x B 1 B 2 B n A n B n A n B n C n D n D n A n B n C n D n 2017 3 30 1 1 1
5、 3 2 A 1 1 B 1 2 C 3 2 D 1 2 14 1 1 A 2 a b 2 A B C D JA 3 a b 3= 2= C 3 7000 7000 A 70 10 2B 7 10 3C 0.7 10 4D 7 10 4 1I a 10 n 1 |a| 10 n n 7000 4 n=4 1=3 21 7000=7 10 3 B 4 A B C D U2 D 5 6 A B C D X4 6 4 21 * = C 6 y= x+a y=x+b 2 8 a b A 2 B 4 C 6 D 8 FF 2 8 y= x+a y=x+b a b y= x+a y=x+b 2 8 8=
6、2+a 8=2+b a=10 b=6 a b=4 B 7 10 21 m 3 0.3 0.4 0.5 0.6 0.7 2 2 4 1 1 10 m 3 A 0.47 0.5 B 0.5 0.5 C 0.47 4 D 0.5 4 W4 W2 10 =0.47 =0.5 A 8 ABCD AC AD BC E F CE CED 6 ABCD A 6 B 12 C 18 D 24 L5 KG DC=AB AD=BC AE=CE CDE =AD+DC ABCD DC=AB AD=BC AC AD E AE=CE CDE =DE+CE+DC=DE+AE+DC=AD+DC=6 ABCD =2 6=12 B
7、 9 y=ax 2 +bx+c a 0 a 0 c 0 b 2 4ac 0 0 A B C D H4 a 0 y y c 0 x =b 2 4ac 0 y 0 a 0 y y c 0 x =b 2 4ac 0 y 0 C 10 ABCD AD BC ABC+ BC=2AD AB BC DC S 1 S 2 S 3 S 1 =3 S 3 =9 S 2 A 12 B 18 C 24 D 48 KQ AB= CD=3 A AE CD BC E AEB= DCB CE=AD AE=CD=3 BE= =2 S 1 =3 S 3 =9 AB= CD=3 A AE CD BC E AEB= DCB AD B
8、C AECD CE=AD AE=CD=3 ABC+ AEB+ BE= =2 BC=2AD BC=2BE=4 S 2 = 4 2 =48 D 4 20 11 x x 2 C4 2 2 x 2 x 2 x 2 12 x 3 x 9 =0 x 1 =3 x 2 =9 A8 x 3 x 9 =0 x 3=0 x 9=0 x 1 =3 x 2 =9 x 1 =3 x 2 =9 13 ABCDEF O O 6 OM 3 2-1-c-n-j-y MM BOM OB ABCDEF O BOM= BOM=6 =3 3 14 10 100 30 3 21 X8 100 30 = =0.3 10 10 0.3=3 3 15 ABCD AB=2 AD=3 E AB F AD AEF EF 1 PB LB CE A Rt BCE CE CE CE 1 www.21-cn- CE AB=1 Rt BCE BE= AB=1 BC=3 CE= = CE= CE CE 1 1 10 100 16 x x+2y x+1 2 +2x =x 2 +2xy x 2 +2x+1+2x =2xy+4x+1 1 2 4A 4C 1 2 1 2 x x+2y x+1 2 +2x =x 2 +2xy x 2 2x 1+2x =2xy 1 17 2017 6 2 2016 2016
