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]
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=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]
- 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]
- 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']