计算下列反常积分:[img=149x50]1803d7b5e0d4e75.png[/img]
A: [img=37x43]1803d7b5e89f40b.png[/img]
B: [img=37x43]1803d7b5f1ec4c4.png[/img]
C: [img=37x43]1803d7b5fb2cc11.png[/img]
D: [img=37x43]1803d7b603af592.png[/img]
E: [img=37x43]1803d7b60b8cf53.png[/img]
A: [img=37x43]1803d7b5e89f40b.png[/img]
B: [img=37x43]1803d7b5f1ec4c4.png[/img]
C: [img=37x43]1803d7b5fb2cc11.png[/img]
D: [img=37x43]1803d7b603af592.png[/img]
E: [img=37x43]1803d7b60b8cf53.png[/img]
举一反三
- 计算下列反常积分:[img=149x50]1803c77e205dc8b.png[/img] A: [img=37x43]1803c77e29af7e0.png[/img] B: [img=37x43]1803c77e3263bdd.png[/img] C: [img=37x43]1803c77e3b69764.png[/img] D: [img=37x43]1803c77e4437b16.png[/img] E: [img=37x43]1803c77e4cab7aa.png[/img]
- 设X为随机变量，[img=173x29]1803be414ac6541.png[/img]用切比雪夫不等式估计[img=186x29]1803be4152f1081.png[/img] . A: [img=37x43]1803be415b72f05.png[/img] B: [img=37x43]1803be416366111.png[/img] C: [img=37x43]1803be416be96fe.png[/img] D: [img=37x43]1803be4174042f2.png[/img]
- 计算[img=221x50]1802e05d7ea814f.png[/img]= ( ) A: [img=37x43]1802e05d8744e44.png[/img] B: [img=37x43]1802e05d8f8d423.png[/img] C: [img=37x43]1802e05d978ec85.png[/img] D: [img=37x43]1802e05da0106e6.png[/img]
- 计算[img=221x50]1802e05d9a17183.png[/img]=( ) A: [img=37x43]1802e05da2a799c.png[/img] B: [img=37x43]1802e05daa48d37.png[/img] C: [img=37x43]1802e05db1f9a38.png[/img] D: [img=37x43]1802e05dbac6274.png[/img]
- 设X，Y为两个随机变量，且[img=179x25]1803395d555effc.png[/img] , [img=226x25]1803395d61f1a43.png[/img] ,则[img=143x25]1803395d6f00057.png[/img]= ( )． A: 1/7 B: 3/7 C: 4/7 D: 5/7