设[tex=3.5x1.357]PHhZEiYbffZQ4ocJzISwJQ==[/tex]是环,[tex=4.286x1.214]uTy6R3F65a66IXR6qHmTRw==[/tex], 试证:如[tex=3.286x1.0]kBE3fVmC3EFMTW2wJnABmMPvZuiOMP0TToUmRpQZnHg=[/tex]，且[tex=4.214x0.786]T9QRQmRxZ81Wcy3bJ1En2aMeAX4ec/qGI7o4z+734+A=[/tex]则[tex=8.143x1.357]dPxIrjO+FUGFIoq/TM0mqL6SjjxO6HI2dkLULraILrc=[/tex]及[tex=8.071x1.357]Zd/emNc1H5V5BGCqBJtutNP8sjqIP8fQs5/tmEQeTAK0K8hPSqdKfKmj4qSFPNG4[/tex]
举一反三
- 设[tex=3.5x1.357]PHhZEiYbffZQ4ocJzISwJQ==[/tex]是环,[tex=4.286x1.214]uTy6R3F65a66IXR6qHmTRw==[/tex], 试证:如[tex=3.286x1.0]kBE3fVmC3EFMTW2wJnABmMPvZuiOMP0TToUmRpQZnHg=[/tex]，则[tex=7.286x1.357]xdzEsA5U5CyW7h5A7Am2p3UQ56m3sSLRQXbyiWnSBcU=[/tex]及[tex=8.214x1.571]vPZWH/bs0A3lEKtgmKA6vLmnudx9kNOpnT77r57u70gyMtwp1+O8N2YVpJkSafhyw0DONZDMfmliKSV2Aji3bA==[/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 。
- 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']
- 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]