1、 1 12 2012 12 3 36 4 1 3 3 A 3 B 3 C D 2 3 143 300 000 000 143 300 000 000 A 1.433 10 10B 1.433 10 11C 1.433 10 12D 0.1433 10 123 3 A B C D 4 3 A 2a 3b=5ab B a 2 a 3 =a 5C 2a 3 =6a 3D a 6 +a 3 =a 95 3 5 A B C D 6 3 60 60 1+ 2 A 120 B 180 C 240 D 300 7 3 2 3 5 A B C D 8 3 x 2 =x x=1 4 2 A 4 B 3 C 2 D
2、 1 9 3 C A B A 0 3 M BMO=120 C A 6 B 5 C 3 D 3 10 3 P a+1 2a 3 x a A a 1 B 1 a C a 1 D a 11 3 8 4 30 1 2 A 6+ B 12 C 4 2 D 10 12 3 MON=30 A1 A2 A3 ON B1 B2 B3 OM A1B1A2 A2B2A3 A3B3A4 OA1=1 A6B6A7 A 6 B 12 C 32 D 64 4 3 12 13 3 a 3 ab 2 = 2 12 14 3 y=x 2 2x+6 15 3 y= k 0 O P Q P Q x y P 1 3 16 3 Rt A
3、BC C=90 AB ABDE O OC AC=5 OC=6 BC 7 17 5 18 6 19 7 20 8 21 8 22 9 23 9 17 5 | 4|+ cos45 18 6 a= 3 b=2 19 7 2012 60 x 70 30 0.1 70 x 80 90 n 80 x 90 m 0.4 90 x 100 60 0.2 1 2 m= n= 3 4 5 80 80 20 8 ABCD EF C A AD E BC F AF CE 1 AFCE 2 AE=a ED=b DC=c a b c 21 8 11.8 40 / / 5000 5500 2000 2160 2400 270
4、0 1 3 2 2012 1000 50 3 12 1 22 9 ABC A 4 0 B 1 0 C 2 6 1 A B C 2 BC y E AE AE=CE 3 y D AD BC F A B F ABC 4 P AE CP+DP P 23 9 l y= 2x+b b 0 b 1 M 4 2 2 b= l y= 2x+b b 0 M b= l y= 2x+b b 0 M 2 M ABCD A 2 0 B 6 0 C 6 2 l ABCD S b S b 4 12 2012 - 12 3 36 4 1 3 3 A 3 B 3 C D 3 =1 3 D 2 3 143 300 000 000
5、143 300 000 000 A 1.433 10 10B 1.433 10 11C 1.433 10 12D 0.1433 10 12 143 300 000 000=1.433 10 11 B 3 3 A B C D A A B B C C D D D 4 3 A 2a 3b=5ab B a 2 a 3 =a 5C 2a 3 =6a 3D a 6 +a 3 =a 9 A 2a 3b A B a 2 a 3 =a 5 B C 2a 3 =8a 3 C D a 6 a 3 D B 5 3 5 A B C D 5 D 6 3 60 60 1+ 2 A 120 B 180 C 240 D 300
6、 1 2 180 60 =120 1+ 2=360 120 =240 C 7 3 2 3 5 A B C D P = = B 8 3 x 2 =x x=1 4 2 5 12 A 4 B 3 C 2 D 1 x 2 =x x1=0 x2=1 4 2 1 D 9 3 C A B A 0 3 M BMO=120 C A 6 B 5 C 3 D 3 ABMO BMO=120 BAO=60 AB C AOB=90 ABO=90 BAO=90 60 =30 A 0 3 OA=3 AB=2OA=6 C = =3 C 10 3 P a+1 2a 3 x a A a 1 B 1 a C a 1 D a P a+
7、1 2a 3 x P a 1 a 1 a B 11 3 8 4 30 1 2 A 6+ B 12 C 4 2 D 10 AC BF D CFE=30 CE BD E Rt CFE CFE=30 CF=4m CE=2 EF=4cos30 =2 Rt CED 1 2 CE=2 CE DE=1 2 DE=4 BD=BF+EF+ED=12+2 Rt ABD AB= BD= 12+2 = +6 A 6 12 12 3 MON=30 A1 A2 A3 ON B1 B2 B3 OM A1B1A2 A2B2A3 A3B3A4 OA1=1 A6B6A7 A 6 B 12 C 32 D 64 A1B1A2 A1B
8、1=A2B1 3= 4= 12=60 2=120 MON=30 1=180 120 30 =30 3=60 5=180 60 30 =90 MON= 1=30 OA1=A1B1=1 A2B1=1 A2B2A3 A3B3A4 11= 10=60 13=60 4= 12=60 A1B1 A2B2 A3B3 B1A2 B2A3 1= 6= 7=30 5= 8=90 A2B2=2B1A2 B3A3=2B2A3 A3B3=4B1A2=4 A4B4=8B1A2=8 A5B5=16B1A2=16 A6B6=32B1A2=32 C 4 3 12 13 3 a 3 ab 2 = a a+b a b a 3 ab
9、 2 =a a 2 b 2 =a a+b a b 14 3 y=x 2 2x+6 5 y=x 2 2x+6=x 2 2x+1+5 = x 1 2 +5 5 5 15 3 y= k 0 O P Q P Q x y P 1 3 4 O y=x y= k 0 y=x P 1 3 Q 3 1 S =1 3+1 3 2 1 1=4 7 12 4 16 3 Rt ABC C=90 AB ABDE O OC AC=5 OC=6 BC 7 1 O OF BC A AM OF ABDE AOB=90 OA=OB AOM+ BOF=90 AMO=90 AOM+ OAM=90 BOF= OAM AOM BOF AO
10、M BOF AAS AM=OF OM=FB ACB= AMF= CFM=90 ACFM AM=CF AC=MF=5 OF=CF OCF OC=6 CF 2 +OF 2 =OC 2 CF=OF=6 FB=OM=OF FM=6 5=1 BC=CF+BF=6+1=7 7 2 O OM CA CA M O ON BC N OMA ONB OM=ON MA=NB O ACB OCM OC=6 CM=ON=6 MA=CM AC=6 5=1 BC=CN+NB=6+1=7 7 8 12 7 17 5 18 6 19 7 20 8 21 8 22 9 23 9 17 5 | 4|+ cos45 =4+2 1 2
11、 =5 2 =3 18 6 a= 3 b=2 = = a+b = a= 3 b=2 = = 19 7 2012 60 x 70 30 0.1 70 x 80 90 n 80 x 90 m 0.4 90 x 100 60 0.2 1 300 2 m= 120 n= 0.3 3 4 80 90 5 80 80 60% 1 30 0.1=300 2 n= =0.3 m=0.4 300=120 3 4 150 151 150 151 80 x 90 80 x 90 5 80 x 90 90 x 100 60% 20 8 ABCD EF C A AD E BC F AF CE 1 AFCE 2 AE=a ED=b DC=c a b c 1 ABCD AD BC 9 12 AEF= EFC AEF= CEF AE=CE AF=CF EFC= CEF CF=CE AF=CF=CE=AE AFCE 2 a b c a 2 =b 2 +c 2
