1、 2015-2016 1. a 8 y=ax 2 a A 2 B 2 C D 2 5 PO=4 P A P B P C P D 3 y=2x 2 1 5 A y=2 x 1 2 5 B y=2 x 1 2 +5 C y=2 x+1 2 5 D y=2 x+1 2 +5 4 4 2 3 A 1 B 1 C 2 D 2 5 A B C D 6 A 1 B 2 C 3 D 4 7 A B C D 1 8 ABCD A B C D 9 y= x 2 +bx+c x x 2 +bx+c 0 A 4 x 1 B 3 x 1 C x 4 x 1 D x 3 x 1 10 5 BC ED DE=6 BC A
2、B C 4 D 3 11 y=ax 2 +bx+c x y x 2 4 5 y=ax 2 +bx+c 0.37 0.37 4 a+b+c + A 24 B 20 C 10 D 4 12 x y=2kx 2 4k+1 x k+1 k 1 0 y x A 1 B 2 C 3 D 4 13 y=x 2 1 14 A A 100 15 AB E AC CD=8cm cm 16 y=2x 2 12x+16 17 2013 5 26 y x 18 4m 1m m 8 78 19 A 0 3 B 4 0 A O B E F E F 20 0 3 1 4 1 2 x A B 3 y C ABC 21 2 1
3、1 1 2 1 1 22 AB=AC AC AB D BC E 1 BE=CE 2 BD=2 BE=3 AC 23 y=ax 2 +bx+c M 1 1 1 y=2x 2 +3x 4 2 y= x 2 +2bx+c+1 24 20 / 25 250 1 10 1 w x 2 3 A B A 30 B 10 25 25 AB D E BD BE=AD 1 2 AO=4 DE 26 y=ax 2 x+c x A B y C 0 2 B 4 0 1 2 3 M BC M BC d d M 4 P E y= x P E A B P E E 2015-2016 1998 a 8 y=ax 2 a A 2
4、 B 2 C D a 8 y=ax 2 a 8 8=a 3 a=2 a 8 8=a 3 a=2 A 2 5 PO=4 P A P B P C P D O r P O d r d P r=d P r d P 5 PO=4 5 P P A O r P O d r d P r=d P r d P 3 y=2x 2 1 5 A y=2 x 1 2 5 B y=2 x 1 2 +5 C y=2 x+1 2 5 D y=2 x+1 2 +5 a 0 0 1 5 1 5 y=2 x h 2 +k y=2 x 1 2 5 B 4 4 2 3 A 1 B 1 C 2 D 2 2 3 1 A 4 2 3 1 1
5、2 2 A 5 A B C D B B 6 A 1 B 2 C 3 D 4 B 7 A B C D 1 4 A a B b Aa Ab Ba Bb B n A m A P A = 8 ABCD A B C D ABCD A 9 y= x 2 +bx+c x x 2 +bx+c 0 A 4 x 1 B 3 x 1 C x 4 x 1 D x 3 x 1 x 1 0 x= 1 x 1 0 x= 1 x 3 0 x x 2 +bx+c 0 3 x 1 B x 10 5 BC ED DE=6 BC A B C 4 D 3 H CF BF DE=BF=6 CH=BH AH AH=BF=3 H CF BF = CA=AF BF=3 D 11 y=ax 2 +bx+c x y x 2 4 5 y=ax 2 +bx+c 0.37 0.37 4 a+b+c + A 24 B 20 C 10 D 4 x=2 y=0.37 x=4 y=0.37 b= 6a x=3 x=1 y=4 a+b+c=4 a+b+c + y=0.37 x=4 y=0.37 b= 6a x= = =3 x=5 y=4 a+b+c=4 a+b+c + =24 A 12 x y=2kx 2 4k+1 x k+1 k 1 0 y x A 1 B 2 C 3 D 4 1 0 k
