设[tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex],[tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex],[tex=0.857x1.286]vDXv5B1sq5mojGRzJQ1zhA==[/tex]均为[tex=0.643x1.286]ZsZs11iKEvfmzDIurZth8g==[/tex] 阶矩阵,则下列结论中不正确的是
未知类型:{'options': ['若[tex=4.143x1.0]9vAZrVBg6W+vWWqAqEUyYXoYPO92hhe/vIHBTZmKYLU=[/tex],\xa0则 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex],[tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex],[tex=0.857x1.286]vDXv5B1sq5mojGRzJQ1zhA==[/tex]都可逆', '若[tex=4.214x1.0]NgvK2f5s9ijGZYUL/TNj2r7LSbP1/skDwSc+9HFHL5c=[/tex],\xa0且[tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex]\xa0可逆,则\xa0[tex=2.5x1.0]5kRDcmzBykhTjCvKxOkAs0shoc0mZQR5zpGhUJy5DsA=[/tex]', '若[tex=4.214x1.0]NgvK2f5s9ijGZYUL/TNj2r7LSbP1/skDwSc+9HFHL5c=[/tex],\xa0且[tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex]可逆,则\xa0[tex=4.214x1.0]rh0TX4MN9zCcC33s0tu8Nx2GPfIYDx7fjowFvCmY0U+2b1yDursqyw5k9BH/Vj9m[/tex]', '若[tex=3.357x1.0]NgvK2f5s9ijGZYUL/TNj2ml0vSa6A5K035rdcMAZA/4=[/tex],\xa0且[tex=3.071x1.214]v9C5PoQbOZP04i1O/pmEezJ4QFAHarLJxhvCZi1Qpz8=[/tex],\xa0则[tex=2.5x1.0]5kRDcmzBykhTjCvKxOkAs5W3jGSADaIUTtwJxPI4NRo=[/tex]'], 'type': 102}
未知类型:{'options': ['若[tex=4.143x1.0]9vAZrVBg6W+vWWqAqEUyYXoYPO92hhe/vIHBTZmKYLU=[/tex],\xa0则 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex],[tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex],[tex=0.857x1.286]vDXv5B1sq5mojGRzJQ1zhA==[/tex]都可逆', '若[tex=4.214x1.0]NgvK2f5s9ijGZYUL/TNj2r7LSbP1/skDwSc+9HFHL5c=[/tex],\xa0且[tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex]\xa0可逆,则\xa0[tex=2.5x1.0]5kRDcmzBykhTjCvKxOkAs0shoc0mZQR5zpGhUJy5DsA=[/tex]', '若[tex=4.214x1.0]NgvK2f5s9ijGZYUL/TNj2r7LSbP1/skDwSc+9HFHL5c=[/tex],\xa0且[tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex]可逆,则\xa0[tex=4.214x1.0]rh0TX4MN9zCcC33s0tu8Nx2GPfIYDx7fjowFvCmY0U+2b1yDursqyw5k9BH/Vj9m[/tex]', '若[tex=3.357x1.0]NgvK2f5s9ijGZYUL/TNj2ml0vSa6A5K035rdcMAZA/4=[/tex],\xa0且[tex=3.071x1.214]v9C5PoQbOZP04i1O/pmEezJ4QFAHarLJxhvCZi1Qpz8=[/tex],\xa0则[tex=2.5x1.0]5kRDcmzBykhTjCvKxOkAs5W3jGSADaIUTtwJxPI4NRo=[/tex]'], 'type': 102}
举一反三
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- >>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']
- 设 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 为三阶矩阵,将 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 的第2行加到第1行得 [tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex],再将 [tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex] 的第1列的-1倍加到第2列得 [tex=0.857x1.286]vDXv5B1sq5mojGRzJQ1zhA==[/tex],记 [tex=6.857x4.786]/4IEId5nW4hfRerJB4nJSJEgQlL9PU1/Boamrrom3+7DF56WUgtsN7e8WkXLg/kWWud8kA9YwIDlWIaSrq5kcTwW8AIsyzGlgs+lEzMnPWk=[/tex],则( )。 未知类型:{'options': ['[tex=5.5x1.286]oG92FaHO4Kpm4oVgHEoQHNdMM6Ynhq3v1ZoKs0wh/pg=[/tex]', '[tex=5.357x1.286]5JjHvLxj4vUf9GTeOtYM2JxKFvBc031UV+ZrBVkuAD0=[/tex]', '[tex=5.071x1.286]l6V1pJErZtUiEukKgDfnJeLEZFh01YZ2P1N7PTsQzJU=[/tex]', '[tex=5.0x1.286]6jqUWT/cL36oKt6umZVIkph0CXTm6ygou8WEe+t8VCI=[/tex]'], 'type': 102}
- 设 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 为3阶矩阵,将 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 第2列加到第1列得矩阵 [tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex] ,在交换[tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex]的第2行与第3行得单位矩阵。记[tex=7.429x4.786]+dPyQEidsVwrq1slOiunR95KJdsdmw5GKqqpcA1CzGJh4ZoK3lu25vta7/Jsus/dh7w8gsFuJiII8125b+BHFgXEifZbCvqSCnedXE0u+hXbEt/8OJrDFIS0l8P3hS7c[/tex],[tex=7.5x4.786]0vAmQKBLGsodCqyvloPMYJp1F2qP2eo7sONrZrzVHQzbHTZov5z98qBn9oheMBKmM9A7ZB6ZF3JCVkwFbtiNnOAhFq1G9t46ih1g3GiwSCj1M2e64fAB2WjCesq7dE8h[/tex],则 [tex=1.857x1.286]rxgc/b9v+Z4B1ox7iD3vrg==[/tex]( )。 未知类型:{'options': ['[tex=2.5x1.286]S/LumCElWmdryGOL1cBV5yfO5o7IqdZ6DcpUWM+bV/0=[/tex]', '[tex=3.071x1.286]SU+UFOOvjm2/Vs1ZSmIt+zrAjbtLYfJwkFRuqieC5h0=[/tex]', '[tex=2.429x1.286]QSMyjTq70VxTbrR33Vu4PBMtWNPS/Ii5O327JjRWt58=[/tex]', '[tex=3.071x1.286]hnqfF8kY84al4KgvGZFwyRlTnDhFEW1yCF1wV7PcEeo=[/tex]'], 'type': 102}
- 设 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 为3阶实对称矩阵, [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 的秩为2,且[tex=14.071x4.214]oWHLmHU+pdEDpvQAl1/az2irZYCrD5n7tNBH0h60RZSRkfTyMbMBkWJdSOttONIz/aIpuB0DtzqN3xTrH5FVBFKkoJXOzqySt1tvYGkL8nUSpkZNcAKMbOAlAVv2kcmeYi+6tOdfVK4HPlO56RaXfQwFcsY1NpD3d9aKf9Ap169R9RP7pwAAI9lrlWeM6IV2kUfE+cegTA/apb491EeeaUNBXKdUyfhOIoUPF4JiNlE4d515R6xesLAEOKJSo8se[/tex](I)求 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 的所有特征值与特征向量。(II)求矩阵 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex]。(本题满分11分)