待定系数法求矩阵函数<img src="https://static.zxtiku.com/wangke/imgs/topic/7665b0ac8e91874c60e5e5ad90e27a28.png"/> (含有参数<img src="https://static.zxtiku.com/wangke/imgs/topic/bc8ae6df59711de71aaea04fad19d7ce.png"/> ):设<img src="https://static.zxtiku.com/wangke/imgs/topic/9aae792ad7bd4c7896c9417d54a091ee.png"/> 是<img src="https://static.zxtiku.com/wangke/imgs/topic/a097a43c8d01e8f0da4857b9ec7e1638.png"/> 重特征值。关于待定系数<img src="https://static.zxtiku.com/wangke/imgs/topic/5dbc0bbdf4214363bc375450bd33afdd.png"/> 的方程,以下说法:(1)左边是余式关于<img src="https://static.zxtiku.com/wangke/imgs/topic/1ab3d74e7d3b4987334c84bea89df2f4.png"/> 求<img src="https://static.zxtiku.com/wangke/imgs/topic/955b802aa5df238bc6407d58c745da5c.png"/> 次导数(<img src="https://static.zxtiku.com/wangke/imgs/topic/d755125d591eb64df058d81f06eb0f74.png"/> 看成常数);(2)然后代入<img src="https://static.pphuashu.com/wangke/imgs/topic/e2746adb538a5ce3e39eb412beee5a54.png.png"/> ;(3)右边的函数部分,是<img src="https://static.zxtiku.com/wangke/imgs/topic/944910bdfbda6a049ef5352d31422343.png"/> 关于<img src="https://static.zxtiku.com/wangke/imgs/topic/aafc7275a83edb11dc659c5e9a27bb8a.png"/> 求<img src="https://static.zxtiku.com/wangke/imgs/topic/5d84ecce7caffbdb8ecc5c76e995c196.png"/> 次导数,再乘上<img src="https://static.zxtiku.com/wangke/imgs/topic/437e5287337afec9edbb9e1d605e564b.png"/> ;(4)然后代入<img src="https://static.zxtiku.com/wangke/imgs/topic/69620d89264295418eab0429135fccfe.png"/> 。正确的是____