设是一个非零实常数，则级数https://img-ph-mirror.nosdn.127.net/knoGV4UX9L4YUquOIP-Jxw==/1409626683467679913.pnghttps://img-ph-mirror.nosdn.127.net/F6WopAq99ovwb-cZPNR7IA==/2566770312642537678.png
设是一个非零实常数，则级数https://img-ph-mirror.nosdn.127.net/knoGV4UX9L4YUquOIP-Jxw==/1409626683467679913.pnghttps://img-ph-mirror.nosdn.127.net/F6WopAq99ovwb-cZPNR7IA==/2566770312642537678.png
1