计算下列积分的值. [tex=0.714x1.0]YiLkHgl7MlxE+QjUplQUKA==[/tex]为由[tex=3.071x1.143]fMZAWLN92hfeusjbot5s5g==[/tex]和[tex=3.0x1.214]E7sPOleL/46hoHosj10jYQ==[/tex]所围矩形边界正向:[tex=6.071x2.714]FE2emU4+moBspjp3OOFOxzdA51HVnSQd7zAo4SfkZ3pC9EWTyUydAWQ/hsalqP/aNkvMJHk0WuIgRkHM8wkbNQ==[/tex].(见图3.20)[img=304x252]178c8d399bbe2cf.png[/img]
举一反三
- 计算下列积分的值. [tex=0.714x1.0]YiLkHgl7MlxE+QjUplQUKA==[/tex]为由[tex=3.071x1.143]fMZAWLN92hfeusjbot5s5g==[/tex]和[tex=3.0x1.214]E7sPOleL/46hoHosj10jYQ==[/tex]所围矩形边界正向:[tex=9.786x2.786]FE2emU4+moBspjp3OOFOx8MrqyT3ut+0VHxUql1AIaD7OqXB9+1efqFwXuvNRszbmnbD8QrwaljpImVLxAZQ2sUubx5GJRPJd8puAgEE6J4jCcCDqCuOm3CUVoI7tJFG[/tex].(见图3.20)[img=304x252]178c8d399bbe2cf.png[/img]
- 计算下列积分的值. [tex=0.714x1.0]YiLkHgl7MlxE+QjUplQUKA==[/tex]为由[tex=3.071x1.143]fMZAWLN92hfeusjbot5s5g==[/tex]和[tex=3.0x1.214]E7sPOleL/46hoHosj10jYQ==[/tex]所围矩形边界正向:[tex=4.786x2.643]G8Basw+pnuC4PEhmMHYw7/lLkCR2nVtnUh+NALMWczM6CYTbSjgsnCVO53sL4EHjChXbCLaWYvuh19q6ey93fg==[/tex].(见图3.20)[img=304x252]178c8d399bbe2cf.png[/img]
- 计算下列积分的值. [tex=0.714x1.0]YiLkHgl7MlxE+QjUplQUKA==[/tex]为由[tex=3.071x1.143]fMZAWLN92hfeusjbot5s5g==[/tex]和[tex=3.0x1.214]E7sPOleL/46hoHosj10jYQ==[/tex]所围矩形边界正向:[tex=4.643x2.643]TKtuaXU5OgHyeSSmH7Xpd1CjeANnDMTpDWNt/AD98zqqr9s+8kTmBF2jQzqEz/aQ[/tex].(见图3.20)[img=304x252]178c8d399bbe2cf.png[/img]
- 对 [tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]的不同值,分别求出循环群[tex=1.143x1.214]StMMJ6qThnpokZJIPGrdFyP3vrLnUdltYxmLxjw8za8=[/tex]的所有生成元和所有子群。(1) 7; (2) 8; (3)10 ;(4) 14 ; (5) 15 (6) 18 。
- 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 。