1、 1 73 2017 5 30 1 A B 14 20 18 1120 280 1 2 A B A 0.5 1 B 0.5 1 2 24 36 60 1 10 x x y 1 y x x 2 3 10 10 42 2 50 20 1 x y y x x 2 50 2000 2920 x W W x 4 30 / p x / x / 30 35 40 45 50 p 600 450 300 150 0 1 p x 2 3 1 a a 0 40 x 45 2430 a = 5 10 / 8.1 / 1 2 1 x x 4.1 / x y y x 1 x 15 x 1 x 9 9 x 15 x 15
2、 / 1 2 80 3x 120 x 40+3x 3x 2 64x+400 3 2 15 2 127.5 15 2 73 14 6 y=ax 2 x 2 a 0 x A B y C B 4 0 1 2 ABC 3 M BC MBC M 7 y=ax 2 +bx+4 x B 2 0 C 8 0 y A 1 y=ax 2 +bx+4 2 AC AB N BC B C N NM AC AB M AMN N 3 OM 2 OM AC 8 y= x 2 x x A B A B y C x D E 4 n 3 73 1 AE 2 P CE PC PE PCE CD CB K CB M CP N CD KM
3、+MN+NK 3 G CE y= x 2 x x y y D y F y Q FGQ Q 9 y=ax 2 +bx+3 a 0 A 3 0 B 4 1 y C AB AC BC 1 2 ABC ABC M M 3 BA A B C A 1 B 1 C 1 A 1 B 1 C 1 M 1 M 1 10 xOy y=ax 2 2ax 3a a 0 x A B A B A l y=kx+b y C D CD=4AC 1 A B 2 l k b a 3 E l ACE a 4 P Q A D P Q P 4 73 11 y=ax 2 +bx+c A 1 0 B 3 0 C 0 3 M N M MD y
4、 BC D x E 1 y=ax 2 +bx+c 2 N NF x F MNFE M 3 DMN=90 MD=MN M 12 y= x+c x A 3 0 y B y= x 2 +bx+c A B 1 B 2 M m 0 x M x AB P N M OA B P N APM M M x M P N M P N “ ” M P N “ ” m 5 73 13 y=ax 2 +bx+2 A 1 0 B 4 0 y C 1 2 D y D S ABC = S ABD D 3 BC B 45 E BE 14 y=ax 2 +bx a b a 0 a b x A C y B AB y= x+ 1 C
5、2 M m 0 OA M x l AB D E m BDE DE 3 2 BDE DE M M OM O ON 0 90 i OB P P O B ON P ii NA+ NB 6 73 15 y=2x+m y=ax 2 +ax+b M 1 0 a b Q a N 1 a MN QMN 16 y= x+3 x y B C B C y=x 2 +bx+c x A P 1 2 M C P M M 3 0 x 3 E CBE 17 y=ax 2 +bx 2 x=1 x A B y C A 2 0 P P PD x D BC E 1 2 P OD=4PE POBE 3 2 M BC N M N B D
6、 M N N 7 73 18 y=ax 2 +bx+c M 2 0 1 2 A x M B y C y=x+1 x D y= k 0 A B C D k 19 y=ax 2 +bx+c a 0 y=x+1 A 1 0 B 4 m C 5 0 1 2 P A B P PD x D AB E PE=2ED P P BEC P 8 73 20 y= x+2 x A y C y= x 2 +bx+c A C x B 1 2 D AC BC CD BD AC E CDE S 1 BCE S 2 D DF AC F CD D CDF BAC 2 D 21 xOy y=a x h 2 +k y=a x h
7、+k y=2 x+1 2 3 y=2 x+1 3 y=2x 1 1 y= x+1 2 4 y= x+1 2 4 2 y=m x 1 2 4m A B A B x C D CAB=90 m P x y BC PBC S S m 22 OABC A 10 0 y=ax 2 +bx+4 9 73 B C x D 2 0 P CB CP=t 0 t 10 1 B C 2 P PE BC E BE t PBE= OCD 3 Q x P PM BQ CQ M PN CQ BQ N PMQN t 23 y=a x 1 x 3 x A B y C D 1 C D a 2 S BCD S ABD =k k 3
8、BCD 24 y=4x 2 2ax+b x A x 1 0 B x 2 0 0 x 1 x 2 y C 1 AB=2 tan ABC=4 2 1 D BC BCD D 3 a b 1 x 1 2 1 x 2 2 25 y= x 2 x=1 x A 1 0 B y C 1 2 N BC NC N 3 P Q y= x+ OAPQ P Q P Q 10 73 26 xOy OABC OA=4 OC=3 P C CB 2 Q O x 1 P Q t s 1 t=1s O P A 2 t=2s tan QPA 3 PQ AB M BM=2AM t s 4 CQ P Q CQP OABC S S t 27 y=ax 2 +2x+c y A 0 6 x B 6 0 P AB 1 2 P PAB=75 P 3 P A AB B P 1 M 1 AO O P M t PAMB S t t S 28 y= x 2 4 x A B y C C 11 73 P C 1 B C B
