判断下面命题是否成立.如果 [tex=3.429x1.286]wFLn5yhIi3gpbxOLnjQIr2cA5py/f1/hPthB4A2lf78=[/tex], 则必有 [tex=2.357x1.286]sf7c7AuUVGY9lixayRLrtQ==[/tex] 或 [tex=2.214x1.286]uGchNwYRZv8pbsB7Kn3lZw==[/tex].
举一反三
- 判断下面命题是否成立.如果 [tex=2.357x1.286]NmWLUlTOILHDfw7uqfi4DQ==[/tex], 且 [tex=3.143x1.286]pIXd6avCU4KEX/GUK8dSOnz85AZD7mcIyc9l265L6B4=[/tex][tex=2.214x1.286]74DEkw4aBf8CecdVHrF2uw==[/tex], 则必有 [tex=2.214x1.286]GeYQSvJjPNBsJ6lL2/GOpw==[/tex].
- 判断下列命题是否为真:(1)[tex=3.643x1.357]/5abqJjwKZ1qr+6hsVFF5EBvfq3ggOFNlHMClz0h9nk=[/tex](2)[tex=2.929x1.357]rGJpyjIjJpbcoBTWxP0Jiw==[/tex](3)[tex=4.5x1.357]2wycHMoqU83MyEp17iBils58bR7YLuCTI2G9NVAdlfY=[/tex](4)[tex=5.214x1.357]CTz2gu+IIm1GgNmYMGaduCRtA41wnW4WqwRWwEhq6aA=[/tex](5)[tex=4.857x1.357]1DcE2BMMOaZhTuxR/mjgsboXxfg5ET59Dp4I/jjEDuw=[/tex](6)[tex=4.643x1.357]BSryrsQYOvTP2hTWRu6t4nAuJwlSs4L9jaq70EpB+Us=[/tex](7)若[tex=6.0x1.357]y0IZLUnBO88nR8WBZYvd7QXv5S1OMINV5cQNzPyiyAc=[/tex],则[tex=3.429x1.357]1brfPwTkVVIX4GfoMIUskA==[/tex](8)若[tex=7.643x1.357]MhLfJXZnhbXiB0x3oNtFzThV4Y1mJxe1VYr7PkJE/T6hmTD3WWp+UxbNwvUQ6DHk[/tex],则[tex=4.143x1.357]LZUA94ISo1po5HWsOVeBCjo0rMvj7uw3bGw5HiZenrI=[/tex]
- 6个顶点11条边的所有非同构的连通的简单非平面图有[tex=2.143x2.429]iP+B62/T05A6ZTM0eeaWiQ==[/tex]个,其中有[tex=2.143x2.429]ndZSw3zT0QTOVLVdoUto1Q==[/tex]个含子图[tex=1.786x1.286]J+vVZa2YaMpc6mJBbqVvWw==[/tex],有[tex=2.143x2.429]lmhx48evnQMhi03NovPXig==[/tex]个含与[tex=1.214x1.214]kFXZ1uR8GjycbJx+Ts2kyQ==[/tex]同胚的子图。供选择的答案[tex=3.071x1.214]3KinXFh3SXhZ7nIe1y9KEV6aadxhhJWeEy6Dij1iObdMUZkY6ZA5J2dVVjPSuhEf[/tex]:(1) 1 ;(2) 2 ;(3) 3 ; (4) 4 ;(5) 5 ;(6) 6 ; (7) 7 ; (8) 8 。
- 设有齐次线性方程组[tex=3.357x1.286]X2hN7n3UmL0lWQo53x55cw==[/tex]和[tex=3.429x1.286]DTP5IuUSYAoYae1AD+w2Uw==[/tex],其中[tex=2.0x1.286]cdFQTIcX/k6W15SnnVIOSQ==[/tex]均为[tex=2.643x1.286]Pcp8G3f9iSqumpymQTeO6g==[/tex]矩阵,现有4个命题:(1)若[tex=3.357x1.286]EEnP5r0Mkp899tr2mCdfvQ==[/tex]的解均是[tex=3.429x1.286]fYtBsAEd/ppcUN+e+qdGTw==[/tex]的解,则[tex=5.786x1.286]QCUVZxVdy7LAaQh5LxeGmFGdf83ZfUr5yoh3U2dXD3c=[/tex] ;(2)若[tex=5.786x1.286]p5QZat2rShslCRIxbMuaBhwHqXUDPpELDWPdXfwIcU0=[/tex],则[tex=3.357x1.286]zkPgnv+RxmjUpziLKbhcsw==[/tex]的解均是[tex=3.429x1.286]TGves6vneBbnQ7XbSbqDNA==[/tex]的解 ;(3)若[tex=3.357x1.286]EEnP5r0Mkp899tr2mCdfvQ==[/tex]与[tex=3.429x1.286]fYtBsAEd/ppcUN+e+qdGTw==[/tex]同解,则[tex=5.786x1.286]AtHDj/7ulHPCJVN+P9wl9r+xGTI4RahAbAVjpjO1BxY=[/tex];(4)若[tex=5.786x1.286]g8SwOoc3mjjpDvp+UxwKlmKIyJYBt/w89p9ioRDdWtw=[/tex],则[tex=3.357x1.286]zkPgnv+RxmjUpziLKbhcsw==[/tex]与[tex=3.429x1.286]TGves6vneBbnQ7XbSbqDNA==[/tex]同解 . 则以上命题正确的是[input=type:blank,size:6][/input] . A: (1),(2) B: (1),(3) C: (2),(4) D: (3),(4)
- 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}