μ http://www.kejianyuan.net
268֣2015?ݣͼھOABCУOA=3OC=5ֱOAOCֱΪxᡢyᣬƽֱϵDDZCBϵһ㣨CBغϣy=k0ͼDBAڵEDE
1OEEOAΪ2k= 2CADECAǷƽУ˵ɣ
3ǷڵDʹõBDEĶԳƵOCϣڣDꣻڣ˵ɣ
278֣2015?ݣΪǿĽˮʶˮԴijжԾˮʵнˮۣͥÿˮΪݣһˮĵ֮ȵ11.52ͼ߱ʾʵнˮۺÿˮyԪˮxm3֮ĺϵ߶ABʾڶʱyx֮ĺϵ 1дBʵ壻
2߶ABֱߵıʽ
3ij5·ݰսˮӦˮ102ԪӦˮΪף
5ҳ27ҳ
μ http://www.kejianyuan.net
2812֣2015?ݣͼƽֱϵУA100OAΪֱڵһԲBΪԲһ㣬ABӳCʹBC=ABCCDxڵD߶OBڵE֪CD=8߾OEA㣮 1OBA= 㣮 2ߵĺʽ
3PΪλڵһڵһ㣬POAEΪıSSȡֵʱӦĵPֻ3
6ҳ27ҳ
μ http://www.kejianyuan.net
2015꽭ʡпѧԾ
ο
һѡ⣨8С⣬ÿС3֣24֣ 13֣2015?ݣ2ĵǣ A 2 B 2 C
D
㣺 ݵĶ壬ij˻1ǾͳΪ
⣺ߩ2=1
ੁ2ĵǩ
ѡD Ҫ鵹ĸʣĶ壺ij˻1Ǿͳ
Ϊڻ⣮ 23֣2015?ݣĸУͼΪԲǣ A B C D
㣺ͼ ר⣺⣮ ҳ濴ͼΪԲļ弴ɣ
⣺ͼΪԲΪ
ѡB ˼ͼͼĹؼͼõͼΣ 33֣2015?ݣȷǣ A 3 a22a2=1 B C D a23=a5 3a2=6a2 a2?a4=a6
㣺ݵij˷ij˷ϲͬͬݵij˷ ͬݵij˷ͬݵij˷㼴ɣ A3a22a2=a2
Ba23=a6
7ҳ27ҳ
μ http://www.kejianyuan.net
Ca2?a4=a6ȷ D3a2=9a2 ѡC ͬݵij˷ͬݵij˷ؼǸݷм㣮
43֣2015?ݣʹ
xȡֵΧǣ
x1 x0 A x 1 B C x1 D
㣺θʽ ȸݶθʽгxIJʽxȡֵΧɣ
⣺壬
x10x1 ѡB Ƕθʽ֪θʽзǸǽĹؼ 53֣2015?ݣһֻĴװ42ÿɫⶼͬ3¼ΪȻ¼ǣ A 1Ǻ B 1ǰ C 2Ǻ D 2ǰ
㣺¼ ֻ231ǺǸݱȻ
ĶжAѡȷ 𣺽⣺һֻĴװ42ÿɫⶼͬ
31ǺDZȻ¼1ǰ2Ǻ2ǰ¼ ѡA ¼һ£ܷҲܲ¼Ϊ
¼Ϊȷ¼Ͳȷ¼¼ȷ¼ַΪȻ¼Ͳ¼ 63֣2015?ݣͼУԳͼεĶԳͼεǣ A ֱ B C ƽı D
㣺ĶԳͼΣԳͼΣ ĶԳͼijһת180㣬תͼܹԭͼغϣԳͼ
һֱ߷ָɵŶԳ۵ʱغϣݴжϳԳͼΣĶԳͼεĸɣ 𣺽⣺ѡAеͼת180ԭͼغϣ
ͼβĶԳͼΣҲԳͼΣ ѡAȷ
ѡBеͼת180ԭͼغϣ
8ҳ27ҳ