第三届全国大学生数学竞赛预赛试卷-参考答案及评分标准
1第三届全国大学生数学竞赛预赛试卷参考答案及评分标准(非数学类,2011)一、(本题共4小题,每题6分,共24分)计算题1.220(1)(1ln(1))lim.xxxexx解:因为22(1)(1ln(1))xxexx=2ln(1)2(1ln(1)),xxeexx220ln(1)lim,xexex………………………………………………3分22ln(1)ln(1)222001limlimxxxxxxeeeexx202ln(1)2limxxxex=22220011ln(1)12lim2lim,2xxxxxeeexx………………5...
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