举一反三
- 已知幂级数 在 处收敛，则 时，幂级数 绝对收敛。（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/75f888305cee4551b37bf60fcef978b1.png
- 已知幂级数 在 处发散，则 时，幂级数 ( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/5754dc1be0d14442a3a1aab9a8d11025.png
- 已知幂级数在处发散，则时，幂级数( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/5754dc1be0d14442a3a1aab9a8d11025.png
- 若幂级数在处收敛，则幂级数在处（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/e1b9a44af3c247c18ecbd519ab4e38fc.png
- 若 =∞，则级数 收敛于 。（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/32fb85dd066a437a87922b798361205f.png
内容
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若=∞，则级数收敛于。（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/32fb85dd066a437a87922b798361205f.png
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将=展开为（的幂级数，并指出收敛范围 ( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/fd6586b3576f490385cbac9dfd8a1dca.png
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若级数http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/8905974d3ec04f3285b62c18114467c3.png收敛，则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/221e7836b56b4f99b50bc3016b80400d.png收敛。（ ）<br>
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若级数发散，则级数++…++…发散。（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/a95be4d04b8540a2a3d2a382ef950324.png
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若级数http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/e3aed89d4b864614815b126628d94b34.png收敛，则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/e2642043e7144a61a807e2a050ccd6a9.png也收敛。( )<br>