高一升高二数学

aqrsde?fty=x2^_\rau()\rA.(2,-1)B.(-2,1)C.(-2,-1)D.(2,1)\r12.ABC3Qw?A(a,b),B(-b,a),C(0,0),\ryz4Qw?D{\r|()\rA.(2a,b)B.(a-b,a+b)C.(a+b,b-a)D.(a-b,b-a)\r} ~P\r13.2a=€-1),ba\n7ba‚,bƒ2\rb=\r14.„|a|=2,|b|=0,ab!45°,†‡6b-a./?ˆU6=\r15.|a|=3,|b|=5,,-a)b,\raŠb=\r16.8VCABCDH(AB+ADXAB-AD)=\rp h‹P\r17.,^,ABCDQUC,AB/7CD,7AB=2CD,M N\rDC ABH??Q=a,4B=b?’“a b”•\rDCsN —˜\r18.2˜=(1,1),6=(4,3),c=(5,-2),\r(1)›œ˜ž\nŸ›˜<! ¡1¢(2)›c8a£;¤¥;\r(3)›§¨©2?‡c=%ia+42b.\r192eiez®Q¯°,±!60°,’›a=2ei+e?,b=-3ei+2e?!˜˜\r20.²³?˜¨A(4,2)®Qw?´ST/!p!COAB,NB=90°,›?B{|¨K˜EvaluationWarning:ThedocumentwascreatedwithSpire.PDFfor.NET.\r21.lal=2Ib1=3,ab!60°,c=5a+3b,d=3a+A˜,¸¸¹m%º\r1»?(1)Z)2(2)C±J\r22.¿ABCw?A(0,0),B(4,8),C(6,-4),?MÀA53,NAC\rB;??74AMNÁÂSÃAABCÁÂÄ?›N?{|˜