当 时， ，求 的二次插值多项式为 .http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/cd8a5f6120864650afa1335344aea896.png
举一反三
- 已知，则的Lagrange插值多项式为______.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/181ceea87cf248bbbb7146045a423f89.png
- 已知 ， 则 的 Lagrange 插值多项式为 ______.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/181ceea87cf248bbbb7146045a423f89.png
- 设<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/bed4f91f4fec44358e1cad3163fc6b90.png" />是在区间<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/a58a11f71a434f2ab38a2f347802f010.png" />上的<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/a392447e03794318affaa2b03bb5967b.png" />的分段线性插值函数，以下条件不是<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/c00fe77a8291453a8cb2577eb68735ad.png" />必须满足的条件是________________. A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/cf6e811a4488413fae8f1839e4d098ea.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/bb93b2d7d02245878ec51e2986c97b5d.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/ec6692c00c2e49b6adbf9b0493638b81.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/214f277da4154f58a43751f80b09d959.png" />
- 求解线性方程组<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/880cd7ef18d94cc0aa4ee9c0b7118d33.png" />的雅可比迭代矩阵是___________. A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/1408cafef14540b494c7b6c38ea2e6cf.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/568a94ce0d574f3ba8a3baf7e3b2ed88.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/763ed8aa81884ee18fc5168914e29a6f.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/467528c3ec81466494978179c7c43c48.png" />
- 用Euler法求微分方程<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/624c4b8f8dca46c7bef22714e1ed1722.png" />数值解，取步长<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/a13d85bddaeb4fcd9917aa25748d2e7c.png" />，则<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/70cf8bfe9dc142c6b500f50abf025d17.png" />的计算值为_______. A: 1.94 B: 0.84 C: 0.94 D: 2