1、 1 2015-2016 1 x=0 A x+1= 1 B 2x=3x C 2x=2 D 2 2x 3 A B C D 3 2x 3y=5 y x A B C D 4 AC A B C D 5 A B C D 6 ABCDE ABFG EAG A B C D 7 A 39 B 43 C 57 D 66 2 8 x=3 2x a=1 a= 9 5x 1 6 x= 10 a b a+b 2b 11 x y 12 4 13 m n n=1 m 14 ABC AD BC D CAD 15 ABC AC=4 ABC CB DEF 2 ABED 16 P ABC PB PC PBC B 17 D ABC
2、BC E F AD CE ABC m BEF 3 89 18 9 2 x 7 =10+5x 19 9 20 9 21 9 ABC 1 AB=4 AC=5 BC 2 D BC D DE AC BA E B 22 9 ABC O 1 1 ABC 4 2 A1B1C1 A1B1C1 2 A2B2C2 A2B2C2 ABC O 3 1 2 A1B1C1 A2B2C2 4 23 9 25 20 x 1 x 2 x 24 9 x y 1 k=1 2 1 k 1 S=x 8y S 25 13 10 8 7 1 2 590 5 750 26 13 ABC CDA ABC AC B 1 AC 2 P Q AC
3、BC A B C 36 BC=8 PB+PQ 3 ABC 5 6 2015-2016 1 x=0 A x+1= 1 B 2x=3x C 2x=2 D x=0 ABCD A x+1= 1 x= 2 B 2x=3x x=0 C 2x=2 x=1 D +4=5x x=1 B 2 2x 3 A B C D x 1 2 x D 3 2x 3y=5 y x A B C D 7 y x 2x 3y=5 x= B y x 4 AC A B C D B AC AC D BE AC D 5 A B C D A B C D C 180 8 6 ABCDE ABFG EAG A B C D EAG 5 2 A 7 A
4、 39 B 43 C 57 D 66 x 7 2 A x x 7 x+7 x+ x 7 + x+7 =39 x=13 9 B x x 7 x+7 x+ x 7 + x+7 =43 x= C x x 7 x+7 x+ x 7 + x+7 =57 x=19 D x x 7 x+7 x+ x 7 + x+7 =66 x=22 B 3 8 x=3 2x a=1 a= 5 x=3 a x=3 6 a=1 a=5 5 9 5x 1 6 x= 1 0 x 5x 1+6=0 5x= 5 x= 1 1 10 10 a b a+b 2b b a+b 2b 11 x y 1 3 z 2 + x+3y=6 12 4
5、11 4 4 n n 2 n n n 2 4 n=10 13 m n n=1 m 4 4 + m=4 n=1 4 14 ABC BAC=4 AD BC D CAD BAD 12 CAD AD BC 15 ABC AC=4 ABC CB DEF 2 ABED 8 ABED ABC CB DEF 2 AD BE AD=BE=2 ABED ABED =BE AC=2 4=8 8 16 P ABC PB PC PBC B 13 CBP ABC PBC B CBP + ABP= PBC+ 17 D ABC BC E F AD CE ABC m BEF m E AD S ABE= S ABD S ACE= S ADC S ABE+S ACE= S ABC= m S BCE= S ABC= m 14 F CE S BEF= S BCE= m= m m 89 18 2 x 7 =10+5x 1 2x 14=10+5x 2x 5x=10+14 3x=24 1 x= 8 19 3x+10x=26 x=2 x=2 y=2 2=4 15 20 x 2 x 1 x 2 21 ABC 1 AB=4 AC=5 BC 1 BC 9 2 D BC D DE AC BA E B 1
