设 [tex=4.929x1.357]u4XavFeehl1zmSGydMSbFgmghH4K4sE2gtorJ/LF3e1m9e2+bznbw7CTti9iLpFu[/tex],且 [tex=4.143x1.0]1OwUQ6dr9Q84yNHlTe0BZLuLvYXOMR4hAydxin09fVU=[/tex] 证明 [tex=2.0x1.214]L13v13gszAHTYXVyhXnbMg==[/tex] 同时相似于上三角矩阵.
举一反三
- 设 [tex=0.786x1.286]dSWbQCTjdbLxKy7q0ps2gg==[/tex] 是一个数域,又 [tex=5.143x1.357]fh2y6Fmoz8kakR6alaP5iy3luOipOegQk/yZOOFvG5GbIz0Ut5vS8hP7CXQc8ZXQ[/tex] 证明 [tex=2.0x1.214]L13v13gszAHTYXVyhXnbMg==[/tex] 作为 [tex=0.786x1.286]dSWbQCTjdbLxKy7q0ps2gg==[/tex] 上矩阵相似, 当且仅当 [tex=2.0x1.214]L13v13gszAHTYXVyhXnbMg==[/tex] 作为 [tex=0.786x1.0]Wj2zFkrpqxe5CqhjLItV+A==[/tex] 上矩阵相似.
- 已知[tex=10.786x1.357]oPxEQGciaJq0uWonaJqXssvTKx2aAMqoshLd51U2O4M=[/tex],若[tex=2.0x1.214]IENxQEh5u4RdnCaqHm72Xg==[/tex]相互独立,则[tex=3.0x1.357]cl60lRnHnAb2Fyha9FYNvw==[/tex] A: 1/2 B: 1/3 C: 2/3 D: 3/4
- 设DES加密算法中的一个S盒为: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 15 12 8 2 4 9 1 7 5 11 A: 1010 B: 0001 C: 1011 D: 0111
- 【单选题】myarray1=np.arange(15) myarray2=myarray1.reshape(5,3) print( myarray1) print(myarray2) 输出值是? A. [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] [[ 0 1 2] [ 3 4 5] [ 6 7 8] [ 9 10 11] [12 13 14]] B. [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] [[ 1 2 3] [ 4 5 6] [ 7 8 9] [10 11 12] [13 14 15]] C. [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14] [[ 0 1 2] [ 3 4 5] [ 6 7 8] [ 9 10 11] [12 13 14]] D. [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14] [[ 1 2 3] [ 4 5 6] [ 7 8 9] [10 11 12] [13 14 15]]
- 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: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)