1、 2018 120 150 4 48 1 5 0 3 A 5 B 0 C D 3 2 y= x A x 2 B x 2 C D 3 A B C D 4 A B C D 5 2x 2 y 2 A 2x 4 y 2 B 4x 4 y 2C 4x 2 y D 4x 4 y 6 +1 4 A 3 4 B 4 5 C 5 6 D 6 7 7 y=x 2 3 A y=x 2 +3 B y=x 2 3 C y= x+3 2D y= x 3 28 8 15 22 A 50 B 48 C 43 D 40 9 AB=13 AC=12 cosA= A B C D 10 y=x 2 +bx+c A 1 m B 3 m
2、 M 2 y1 N 1 y2 K 8 y3 y=x 2 +bx+c A y1 y2 y3 B y2 y1 y3 C y3 y1 y2 D y1 y3 y2 11 CD A C AB 13 B 6 D AB i=1 2.4 CD ( 11 ) A 8.1 B 17.2 C 19.7 D 25.5 12 a x x = 2 a A 20 B 19 C 15 D 13 4 16 13 3500000 3500000 14 y= m 2 x 2 m 15 1 1 10 100 200 1 1 1 8 3 1 15 16 16 OAB C OA CD OA CD D O OC OB E OA=4 17
3、A B C B C B A A A 1 C B y x 17 18 18 ABCD 3 CB M BM=1 AM B N O AC BD ON ON 8 16 19 EF AB E CD F FG AB G 19 20 8 5 A B C D E 1 2 1 2 5 2 5 1 1 20 10 40 21 1 x+2y 2 x+2y x 2y 2 + 1 22 y1=k1x+6 y2= A B x C B D OC CD=3 1 1 y1 y2 2 OA OB 23 40000 1 2 100 400 1.25a% 20 a 30 10% 2.4a% a 24 ABCD AC E BE BE
4、F CF CF=BC 1 DE=BE 2 EF=CE+DE 25 10 26 12 22 25 A A B A B A=2016 B=6102 A B A B A B 6102 610 102 26 261 610+102+26+261=999 999 2016 1 111 2 1 x 1 y 27 x y 26 y=ax 2 +bx 2 x A B y C A 1 0 1 2 BC P OCPB P 3 y M N BC N 71 68 2017-2018 12 1 D 2 D 3 D 4 D 5 B 6 B 7 A 8 C 9 C 10 B 11 A 12 D 6 13 6 14 m 2
5、15 16 +2 17 10 18 17 / 11 1 =100 / B A B x 50x=100 x 5 x=10 18 BM=1 2 MN= CD=3 8 19 -2 -4 -6 -8 20 1 -2 =400 60 160 80=100 -4 2 20 1 1 12 -6 1 1 = = -8 21 1 x+2y 2 x+2y x 2y 2 + 1 1 =x 2 +4xy+4y 2 x 2 4y 2 -2 =x 2 +4xy+4y 2 x 2 +4y 2- -3 =4xy+8y 2 -5 2 = -7 = -9 = -10 22 1 y1=k1x+6 y E 0 6 -1 = = -2
6、 CD= x BC=5x 5x 2 = x 2 +4 x= CD= x=1 BC=5x= B 4 2 -4 2=k1 k1= 2 y1= 2x+6 y2= -6 2 -8 = -10 23 1 x 40000 x -1 40000 x -3 -4 8000 -5 2 40000 1+10% =400 1 1.25a% 100 1+2.4a% -8 t=a% 60t2 8 t1= t2= a%= a=25 -9 a 25 -10 24 1 ABCD SAS -3 -4 2 EF G EG=EC CG -5 -7 CE=GC SAS -9 ED -10 25 1 111 A=1234 B=4321
7、 -2 4 A B C D + + + =111 A+B+C+D B C D 111 -4 2 y1x1 100y+10+x+100+10x+1+100x+10+y+100+10y+1=100x+100y+222=111 x+y+2 -7 x+y+2=9 x+y+2=18 x+y=7 x+y=16 -10 26 1 y=ax 2 +bx 2 C 0 2 = 3 0 -2 1 0 A B y=ax 2 +bx 2 y= x 2 x 2 -4 2 P y BC Q OB E P x x 2 x 2 -5 B 3 0 C 0 2 BC y= x 2 x x 2 -6 OBPC=S +S +S = = 2x x 2 = x 2 +3x+3 = x 2 + x= ABPC . P -8 3 AM y D D 0 2 AM y=mx+2 B 3 0 0=3m+2 m= AM y= x+2 2 N x x 2 2 = 3+2 2 + 2 MN 2 = x+2 2 + x 2 2 BN 2 = x 3 2 + x 2 2 MB=BN N 2 8 MB=MN 3+2 2 + 2 = x+2 2 + x 2 2 13x 2 28x 33=0 x1=3 x2= BN=MN x+2 2 + x 2 2 = x 3 2 + x 2 2 10x= 35 x= N 2 8 - -12
