• 2022-06-07
    设随机变量[tex=2.643x1.357]aikhN0DJgQzlD9+fBIp9pQ==[/tex]具有概率密度 [tex=13.786x2.429]EPaISH7F+7OFqeEao9lVbeUQyaoF09nCPhE5jc02P4HXTg11M4eZF0AnmspP+9DKvS4Ab2Y8nOweMCnt2LOezQ==[/tex]求[tex=9.571x1.357]lBv1hWdvvhZJGLvvUAYaKFM2gENwpCCXyEl0jHesUvUY7GueI7D8wgYGmZQQC5oj[/tex]
  • 解:注意到[tex=2.643x1.357]4QuIFiVbvK7DnnyBEe21RQ==[/tex]只在区域[tex=4.071x1.357]LRcQia517uPZHVDu9yHd/g==[/tex],[tex=4.286x1.071]8ZCTTOXb0xtCg5/h1FL8+w==[/tex](如图)上不等于零,故有[img=246x281]1787d72a56f1f9a.png[/img][tex=12.857x2.714]hEsn5DDtTNRKgPICSWHC4dsphHSDwjijEJl0PjeTf9QJd3hktzpbAVqjHNUhSRS8I9gtYbBGC0ux722HFMj3WCQ4Nv5Z/RbJKZ87ftVDZH0=[/tex][tex=6.0x2.643]yr/TaMLLB2XVLNoVebNMigtaBmyNP44yenX3//E/BrE=[/tex][tex=7.429x2.857]YLv9OuZDedhdYpKsUDuBtwFJWO7VNbY61l1/QO3W2yQ2nkvMdBLhfgH6vbuc+2mI[/tex][tex=7.0x2.786]4zOhIfYGcChgu8598DzpxUAd8egoUUbLzeXts0N3DAKfixmkdK6ma2pFS8L1dEf9[/tex],[tex=12.5x2.714]4F6GvzbZybkR2Gvso2iSuDvjTrZa5xnakF5ejxIAT/9LepCCG/25gnfqLxiqrop4cleA7lJqia0GX2hbOMPp97gHyQuQ5Hyu6hhlThA6JIU=[/tex][tex=5.929x2.643]HB3NAev3MT1ozFBMsz4mK0Bgm//dTnt8oQ9Tt0NevQU=[/tex][tex=8.643x2.857]YLv9OuZDedhdYpKsUDuBtwFJWO7VNbY61l1/QO3W2yQRUMbLIrB4MeWJ6d0JOK+g[/tex],[tex=3.714x1.357]keckLm+5I9tOJFZS8H9HZw==[/tex][tex=10.071x2.714]pw87i6IFLVpi9qzsAvoJMBs/IBw4O+lbDTmWVgd1LPl7t8o3nzaYLx9gp6ZlHT4VTC8ykhSN7a+FCboNn2SXBciAg+J7SK7DlcMZAa+fQTc=[/tex][tex=6.5x2.643]ErOd120Jz680N4H6U1MojXa+54xn5uaeFq9wAc4u5MA=[/tex][tex=9.214x2.857]YLv9OuZDedhdYpKsUDuBtwFJWO7VNbY61l1/QO3W2yR/8bmTainMhql7/qTGDtt4[/tex],[tex=5.143x1.357]YRHgHmN/yZW92ECOHesamjRdQBhIpZQpZyLgtpTSCxM=[/tex][tex=9.429x1.357]f/RyEJBExgEdwCyjitzqjcpgvmUqGIzTqXCPca7OG98=[/tex]

    内容

    • 0

      下面是图的拓扑排序的是?(多选)[img=340x240]1802faef6ebcc2a.png[/img] A: 2 8 0 7 1 3 5 6 4 9 10 11 12 B: 2 8 7 0 6 9 11 12 10 1 3 5 4 C: 8 2 7 3 0 6 1 5 4 9 10 11 12 D: 8 2 7 0 6 9 10 11 12 1 3 5 4

    • 1

      【单选题】myarray1=np.arange(15) myarray2=myarray1.reshape(5,3) print( myarray1) print(myarray2) 输出值是? A. [ 1  2  3  4  5  6  7  8  9 10 11 12 13 14 15] [[ 0  1  2] [ 3  4  5] [ 6  7  8] [ 9 10 11] [12 13 14]] B. [ 1  2  3  4  5  6  7  8  9 10 11 12 13 14 15] [[ 1  2  3] [ 4  5  6] [ 7  8  9] [10 11 12] [13 14 15]] C. [ 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14] [[ 0  1  2] [ 3  4  5] [ 6  7  8] [ 9 10 11] [12 13 14]] D. [ 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14] [[ 1  2  3] [ 4  5  6] [ 7  8  9] [10 11 12] [13 14 15]]

    • 2

      下面是图的拓扑排序的是?(多选)[img src="https://i1.chinesemooc.org/course/formula/201610/eb69927aaf8baae83211ee3fadf836e7.png"] A: 2 8 0 7 1 3 5 6 4 9 10 11 12 B: 2 8 7 0 6 9 11 12 10 1 3 5 4 C: 8 2 7 3 0 6 1 5 4 9 10 11 12 D: 8 2 7 0 6 9 10 11 12 1 3 5 4

    • 3

      【单选题】请用地点定桩法在4分钟内记忆数字。 4 0 1 3 6 3 5 1 9 8 8 9 7 2 9 3 0 9 5 3 1 7 7 5 2 3 3 0 5 0 1 4 1 3 8 3 5 7 9 7 (5.0分) A. 已背 B. 未背

    • 4

      利用行列式的性质计算下列行列式的值1 2 0 0 02 5 0 0 0 9 8 1 2 37 6 4 5 65 4 7 8 9