计算矩阵的乘积：[tex=4.5x2.929]De166nmeTkb4C/83+ZZH29JenReePwTkAq1b02mVainiDSJ2gCNPiSEQk+cWVcIM4HloXwPp40nQcJbADxPClQ1KXa9DNWOtqY/1NaKqcBw=[/tex]。
举一反三
- 以4，9，1为为插值节点，求\(\sqrt x \)的lagrange的插值多项式 A: \( {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) B: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) C: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x +1) + {1 \over {24}}(x - 4)(x - 9)\) D: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
- 计算下列矩阵的乘积:[tex=4.5x2.929]dEdrC9SQsN/3Vx39SaFo4BmfHDOYpGYfjQEI8pOSqeCMPASKTUss3zsYaXg1recJU9gxIHaGGtswYKyiinStRw==[/tex]
- 计算下列矩阵的乘积 (1) (2) (2) (4)95d4b1623254f3c4a889c4219d2252c4.pngc9a4c2051f5c4fc8e938a7c083dc30ad.png39a40f817fd5ba62c3bae6ac05bba5ea.pngd2438b12fcc05c19c950102136e198fb.png
- 在化合物[tex=3.143x1.214]v4ZSy342c4rYHJ17K2Seyg==[/tex]的质谱中， [tex=1.0x1.0]/4LSvKfNeQWJ+IvWbbbjdA==[/tex]和[tex=2.286x1.143]6xy5cvv57RhdtLjINMq7Bw==[/tex]峰的相对强度比应为（ ） A: 98. 9 : 1. 1 B: 98. 9 : 0. 02 C: 2 : 1 D: 1 : 1 E: 3 : 1
- 求解下列矩阵对策,其中赢得矩阵 [tex=0.786x1.0]b4HkKtHXeHofHX/gJc8Agg==[/tex] 为$\left[\begin{array}{llll}2 & 7 & 2 & 1 \\ 2 & 2 & 3 & 4 \\ 3 & 5 & 4 & 4 \\ 2 & 3 & 1 & 6\end{array}\right]$