1、 2014 12 3 36 3 1 3 2014 A 3 2 =9 B =3 C 2 0 =1 D | 3|= 3 A B C.0 1 1 1 D 0 A 3 2 =9 B =3 C 2 0 =1 D | 3|= 3 B 2 3 2014 A B C D A B C D D 180 3 3 2014 A B C D A 4 3 2014 556.82 A 556.8210 4B 5.568210 2C 5.568210 6D 5.568210 5 a10 n 1 |a| 10 n n a n 1 n 1 n 556.82 5.568210 6 2.466 1910 13 C a10 n 1 |
2、a| 10 n a n 5 3 2014 AD EAC AD BC B=30 C A 30 B 60 C 80 D 120 EAD= B EAC AD BC B=30 EAD= B=30 AD EAC EAC=2 EAD=230 =60 C= EAC B=60 30 =30 A 6 3 2014 A B C D D “ ” “” “ ” “ ” 7 3 2014 AB 12 1 2 AB A 4 B 6 C 12 D 24 - BC AB Rt ABC =i= AC=12 BC=6 AB= =6 B BC 8 3 2014 x y A 2.5 B 15 C 4 D 3 / y 2.5 2.5
3、1.5 = A 2.5 B 45 15=30 C 2.5 2.5 1.5=1 D 100 65=35 1.5km 1.5 = / C 9 3 2014 2013 2014 NBA MVP 8 8 1 2 3 4 5 6 7 8 30 28 28 38 23 26 39 42 A 29 28 B 28 29 C 28 28 D 28 27 23 26 28 28 30 38 39 42 28 =29 B 10 3 2014 A a b c a c b B 1% 100 C M x 1 y 1 N x 2 y 2 y= x 1 x 2 y 1 y 2D 10 S =4 S =9 A B C D A
4、 a b a b c a c b A B 1% 100 B C M x 1 y 1 N x 2 y 2 y= 0 x 1 x 2 y 1 y 2 C D 10 S =4 S =9 D A “ ” 11 3 2014 1= A x=1 B x= 1+ C x=2 D x x x+2 x 1 x+2 =3 x 2 +2x x 2 x+2=3 x=1 x=1 D “ ” 12 3 2014 ABCD AB=4 BC=8 E F AD BC ABCD EF C AD H D G CFHE EC DCH BF 3BF 4 H A EF=2 A 1 B 2 C 3 D 4 CFHE CF=FH BCH=
5、ECH DCE=30 EC DCH H A BF=x AF=FC=8 x BF G D CF=CD BF=4 BF F FM AD M ME EF FH CG EH CF ABCD AD BC FH CG EH CF CFHE CF=FH CFHE BCH= ECH DCE=30 EC DCH H A BF=x AF=FC=8 x Rt ABF AB 2 +BF 2 =AF 2 4 2 +x 2 = 8 x 2 x=3 G D CF=CD=4 BF=4 BF 3 BF 4 F FM AD M ME= 8 3 3=2 EF= = =2 3 C BF 5 4 20 4 13 4 2014 “ ”
6、= “ ” 0 0 14 4 2014 y= 2 x+y y = 0 x y x 4 0 4 x 0 x 4 x4 x=4 y= 2 x+y y = 4 2 2 = 15 4 2014 ABC 2 D E F BC CA AB A B C 1 ABC 60 2 AD ABC BD=CD=2 BAC= B= C=60 AD BC AD= = 2 3 = = 16 4 2014 x 2 +2kx+k 2 2k+1=0 x 1 x 2 x 1 2 +x 2 2 =4 k 1 x 1 2 +x 2 2 =x 1 2 +2x 1 x 2 +x 2 2 2x 1 x 2 = x 1 +x 2 2 2x 1
7、 x 2 =4 k k x 1 2 +x 2 2 =4 x 1 2 +x 2 2 =x 1 2 +2x 1 x 2 +x 2 2 2x 1 x 2 = x 1 +x 2 2 2x 1 x 2 =4 x 1 +x 2 = 2k x 1 x 2 =k 2 2k+1 4k 2 4 k 2 2k+1 =4 k=1 1 ax 2 +bx+c=0 a 0 x 1 x 2 x 1 +x 2 = x 1 x 2 = 17 4 2014 y=x 2 A 1 A 2 A 3 A n y=x 2 L y=x M 1 M 2 M 3 M n L y=x A 1 A 2 A 3 A n M 2014 4027 4027
8、 y=x 2 y n = x a n 2 +a n A n M 1 a 1 a 1 y 1 = x a 1 2 +a 1 y=x 2 y 1 = x a 1 2 +a 1 A 1 x 2 = x a 1 2 +a 1 2a 1 x=a 1 2 +a 1 x= a 1 +1 x a 1 =1 M 1 1 1 M2 a 2 a 2 y 2 = x a 2 2 +a 2 =x 2 2a 2 x+a 2 2 +a 2 y=x 2 y 2 A 2 x 2 =x 2 2a 2 x+a 2 2 +a 2 2a 2 x=a 2 2 +a 2 x= a 2 +1 x a 2 =3 M 2 3 3 M 3 a 3 a 3 y 2 = x a 3 2 +a 3 =x 2 2a 3 x+a 3 2 +a 3 y=x 2 y 3 A 3 x 2 =x 2 2a 3 x+a 3 2 +a 3 2a 3 x=a 3 2 +a 3 x= a 3 +1 x a 3 =5 M 3 5 5 M 2014 20142 1=4027 4027 4027 4027 4027 y=x 7 61 18 6 2014 1 a=2sin60 tan45 b=1 a a b = 1 = 1 = 1 = a=2sin60 tan45 =2 1= 1 b=1
