【简答题】
<img title="13.jpg" alt="13.jpg" src="https://huaweicloudobs.ahjxjy.cn/CA271B5C4E7BC9799A6A8E0A60DA452F.jpg"/>
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/66F113EDFBE7852966E87734F22166E1.png" title="4.png" alt="4.png"/>
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/BFF86A40E14A5EAAA14D412CAA9B7C6B.png" title="9.png" alt="9.png"/>
【简答题】
<img title="12.jpg" alt="12.jpg" src="https://huaweicloudobs.ahjxjy.cn/FE8EF8214BCA9266BE9A2ABE0A168E2D.jpg"/>
【简答题】
设三阶实对称矩阵<img class="jc-formula" data-tex="A" src="https://huaweicloudobs.ahjxjy.cn/60BDCDAB2585C1363A4374A112B62C6E.png" style="vertical-align: middle;"/>的特征值是1,2,3,矩阵<img class="jc-formula" data-tex="A" src="https://huaweicloudobs.ahjxjy.cn/60BDCDAB2585C1363A4374A112B62C6E.png" style="vertical-align: middle;"/>的对应于1,2的特征向量分别为<img src="https://huaweicloudobs.ahjxjy.cn/5DBC389B825B035A59A934A4AE227952.png" title="4.png" alt="4.png"/>(1)求矩阵<img class="jc-formula" data-tex="A" src="https://huaweicloudobs.ahjxjy.cn/60BDCDAB2585C1363A4374A112B62C6E.png" style="vertical-align: middle;"/>的对应于特征值3的特征向量。(2)求矩阵<img class="jc-formula" data-tex="A" src="https://huaweicloudobs.ahjxjy.cn/60BDCDAB2585C1363A4374A112B62C6E.png" style="vertical-align: middle;"/>。
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<img src="https://huaweicloudobs.ahjxjy.cn/71E80093F210752C6531F25AB6FBEF92.png" title="7.png" alt="7.png"/>
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<img src="https://huaweicloudobs.ahjxjy.cn/54D096DB6BB3FFC8A2FBFB6802F223D3.png" style="" title="tzz.png"/><img src="https://huaweicloudobs.ahjxjy.cn/04BC76C9934064E01E9098FE109432D7.png" style="" title="1.png"/>[填空1],[填空2]
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<img src="https://huaweicloudobs.ahjxjy.cn/88FE88F0EE2C2E719AC98E20785E9585.png" style="" title="0.png"/><img src="https://huaweicloudobs.ahjxjy.cn/65C39110BD262FCBCA423E9DC7D0AD32.png" style="" title="4.png"/>[填空1]
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Directions: Fill in the blanks with the words given below. Change the form if necessary.[fee; react; expand; besides; quantity; stay; highly; device; customer; commercial]9. The present government is unlikely to[填空1]in power after the next election.
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Direction: Fill in the blanks with the words given below. Change the form if necessary.[hug; flatten; ancestor; amazing; solemnly; comfort; awful; desperately; uproot; cousin]8. I asked if he employed someone to do this[填空1]job for him.