A、级数<img id=\""ODryzkiTEMP20180523111612655.png\"" src=\""http:\/\/ccm2cdn.open.com.cn\/zyglpt\/OD\/TEMP\/2018\/0523\/ODryzkiTEMP20180523111612655.png?Expires=1842405373&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=l%2BLaU7nUh0DNiaOqJMM1AKErNT0%3D\"" \/>收敛
B、级数<img id=\""ODyqswvTEMP20180523111612975.png\"" src=\""http:\/\/ccm2cdn.open.com.cn\/zyglpt\/OD\/TEMP\/2018\/0523\/ODyqswvTEMP20180523111612975.png?Expires=1842405373&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=PnPPGngsG9\/L71lIyel\/HOb\/kkU%3D\"" \/>未必收敛
C、级数<img id=\""ODlwkqzTEMP20180523111613748.png\"" src=\""http:\/\/ccm2cdn.open.com.cn\/zyglpt\/OD\/TEMP\/2018\/0523\/ODlwkqzTEMP20180523111613748.png?Expires=1842405373&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=De%2BaHxp0qL6okDuTHkmbkvRK8WU%3D\"" \/>收敛
D、级数<img id=\""ODyanebTEMP20180523111614052.png\"" src=\""http:\/\/ccm2cdn.open.com.cn\/zyglpt\/OD\/TEMP\/2018\/0523\/ODyanebTEMP20180523111614052.png?Expires=1842405374&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=eLUJ4zyKiaNVMzNknfqNEB\/pyNg%3D\"" \/>,未必收敛