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5.14112131234581EF152EF353EF365.2()1.ab23.b//a,c//a,b//c()1.2.3.5.3()1.2.3.()12.,,,,345.()65.41:()2.6.111xaxaax2xa233993400.5aaaaa-a6ax2axaxxaxaax21xaax2xaaaaa00.ax2(x0)ax2aaaaa345ax2(x0)axaxxaxaax6aa00aaa2a-aa0a076.21xaa3xaxa2a3aaa3304330aaa5ax33axaxxaxaax633aa6.3102132,723+830.10100100011aba+b=0a=baaa2|a|0|a|=aa0|a|=-aa003abab=11-14.12na10101an1212ab,0baba,0babababa03ab;1;1;1babababababa4abbaba5abbaba221abba2)()(cbacba3baab4)()(bcacab5acabcba)(678:an9107.1()1a,b2.()()()()12XX3YY4PPxyxya,bP()1XYxy211xy232x|y|y|x|xy312xy3++++7.2()1XY23()()a()a()a()a8.11.128.2,.128.3Pab1.Pa0b002.Pa0b0003Pa0b004Pa0b0005Pxb=006Pya=00vvvvvv8.419.11()23:1:ab,bc,ac().2:()()ab,a+cb+c().3:()()ab,c0,acbc;ab,c0,acbc.(4:ab,cd,a+cb+d.()5:ab0,cd0,acbd.()6:ab0,nN,n1,anbn,.0n1.()9.21.129.3123xaxbaxbabxaxbbxa11221234563124123456abababxaxbxaxaxaxbxbxbba121345