中国大学MOOC: 无穷等比数列http://img-ph-mirror.nosdn.127.net/Sgx-SQmpJnKBPe0PvuR05w==/6608510185143148025.png的和为http://img-ph-mirror.nosdn.127.net/xd4Da-5ULPpHlglh-NRxvQ==/6608208918958090522.png.
举一反三
- 中国大学MOOC: 一个单位负反馈系统的开环传递函数为http://img-ph-mirror.nosdn.127.net/JSk6cvmp15ubGkkyd-dGlg==/6598181372974062879.png，试确定系统阶跃响应的动态性能http://img-ph-mirror.nosdn.127.net/zNWHsiynbK_GL3ppVZ85rw==/1082834235424067544.png,http://img-ph-mirror.nosdn.127.net/ZWYxBqUL3c_BqQ8Cu7QJqg==/2393944676941754810.png,http://img-ph-mirror.nosdn.127.net/XlVgUO7BDPYluRlU48mW6A==/2810527642473328756.png。(http://img-ph-mirror.nosdn.127.net/R548rvE3a5gM3vJlzynA8Q==/6608803754747757399.png=5%)（ ）
- 中国大学MOOC: 几何级数http://img-ph-mirror.nosdn.127.net/-QQygKHa-COQ7MpjKS31Vg==/6608837839608225068.png当http://img-ph-mirror.nosdn.127.net/2PmrOS1_7m2WSJC_X7osuQ==/6608688306026846906.png时收敛.
- 中国大学MOOC: 设http://img-ph-mirror.nosdn.127.net/mAr40Ex9dj7RKIDO0xK-3A==/3750091114817379012.pnghttp://img-ph-mirror.nosdn.127.net/qwxf7Qhyl2gIpW9DHu82HA==/6619385454653355855.png是样本均值，http://img-ph-mirror.nosdn.127.net/JT3hoTnejG6vejzezIDeEg==/6608549767561984903.png是样本方差，http://img-ph-mirror.nosdn.127.net/JLWEQ91n2G2BQ5AGkD_rJA==/1161084278948858061.png是样本二阶中心矩，当http://img-ph-mirror.nosdn.127.net/jeN7752H6T6S_JzCMitNwQ==/6608555265119848391.png未知时，检验http://img-ph-mirror.nosdn.127.net/1kGBCs_IX4J8CfS80X9_Tw==/6632173874400291109.pnghttp://img-ph-mirror.nosdn.127.net/aWQhr7faqo0bSXG3SufJcw==/6632017743749146630.png 在显著水平http://img-ph-mirror.nosdn.127.net/ohfMIFH44HORvasXTiYCqg==/6599281984052422974.png下，http://img-ph-mirror.nosdn.127.net/HS3L-Nc09Pxb9HLQqTsaqQ==/6619246916188684692.png检验使用的统计量是( )
- 中国大学MOOC: 无限循环小数http://img-ph-mirror.nosdn.127.net/mtE4pTh9boDkWazMNUtXjA==/6608804854259391754.png.
- 单色光垂直照射宽度为a的狭缝，则所形成的夫琅和费衍射的明纹、暗纹的计算公式分别是 A: 暗纹公式<img src="http://img-ph-mirror.nosdn.127.net/Col4q733bC2LTWMYOS_kPg==/6631483381097396880.png"> B: 暗纹公式<img src="http://img-ph-mirror.nosdn.127.net/gAfmdyaYZbSjb7_nXfpx5g==/6631474585004374606.png"> C: 明纹公式<img src="http://img-ph-mirror.nosdn.127.net/Col4q733bC2LTWMYOS_kPg==/6631483381097396880.png"> D: 明纹公式<img src="http://img-ph-mirror.nosdn.127.net/gAfmdyaYZbSjb7_nXfpx5g==/6631474585004374606.png">