1、交换积分次序[img=171x51]1803bbf6f0c574e.png[/img]( )
A: [img=151x51]1803bbf6fc56f14.png[/img]
B: [img=151x53]1803bbf70699ad0.png[/img]
C: [img=151x51]1803bbf711377b9.png[/img]
D: [img=151x51]1803bbf71c5331a.png[/img]
A: [img=151x51]1803bbf6fc56f14.png[/img]
B: [img=151x53]1803bbf70699ad0.png[/img]
C: [img=151x51]1803bbf711377b9.png[/img]
D: [img=151x51]1803bbf71c5331a.png[/img]
举一反三
- 设积分区域D是由直线y = x,y = 0,x =1围成，则[img=173x60]1803d360a797630.png[/img] A: [img=151x51]1803d360b1cdf24.png[/img] B: [img=151x51]1803d360bbfae34.png[/img] C: [img=151x51]1803d360c6457e5.png[/img] D: [img=151x53]1803d360d1e65df.png[/img]
- 改换二次积分[img=151x51]180342ee8e277f6.png[/img]的积分次序得 A: [img=151x51]180342ee985170e.png[/img] B: [img=151x51]180342eea2f120a.png[/img] C: [img=151x51]180342eead6f766.png[/img] D: [img=151x51]180342eeb8717d2.png[/img]
- 交换二重积分[img=183x51]1803956cdc483e6.png[/img] 的积分次序，则[img=102x25]1803956ce4b49d6.png[/img] A: [img=151x51]1803956cef8abeb.png[/img] B: [img=151x51]1803956cfa21022.png[/img] C: [img=152x51]1803956d049ca39.png[/img] D: [img=151x51]1803956d0e600ef.png[/img]
- 设D是由[img=100x22]18039571413c177.png[/img] 及x轴围成的区域，[img=49x25]180395714939b75.png[/img] 在D上连续，则 [img=153x48]18039571538d5a1.png[/img] （ ） A: [img=152x51]180395715e253f8.png[/img] B: [img=151x51]1803957167b21de.png[/img] C: [img=151x51]180395717270193.png[/img] D: [img=151x53]180395717cc1b75.png[/img]
- 在下列命题中:如果f(x)=[img=28x44]17e0bf9914bb2f1.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=28x44]17e0bf992111a1c.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=55x44]17e0bf992d8de0a.png[/img],那么[img=29x29]17e0bf9939482bb.png[/img]f(x)不存在;如果f(x)=[img=87x53]17e0bf99450fa82.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0。其中错误命题的个数是( A: 0 B: 1 C: 2 D: 3