已知[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex]是随机变量[tex=0.857x1.0]N7iCrOsS+NNEUUlnsYCi1g==[/tex]的概率密度，试求其中的未知常数[tex=0.571x0.786]c59+3vo0/Vn/FvNRhDRu5g==[/tex].[tex=11.5x3.643]0zGGprpFZQADl54kFZByCs2qXh3JPWjeieIW0aY3V1VWUbM8wb9xH5rgQ0LUZAWB33J27EPSUNUc1xzzrVJvEbBsVcEIvPAYqtMYmwEHmxQCFdwEUadvfCY9CMbSAghigKMcVRPzrI9xK4Fm5qlC9g==[/tex]
举一反三
- 静止型[tex=0.571x0.786]c59+3vo0/Vn/FvNRhDRu5g==[/tex]地中海贫血患者之间婚配，生出轻型[tex=0.571x0.786]c59+3vo0/Vn/FvNRhDRu5g==[/tex]地中海贫血患者的可能性是 A: 0 B: 1/8 C: 1/4 D: 1/2 E: 1
- 【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]
- 设二维离散随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的可能值为(0, 0)，(−1, 1)，(−1, 2)，(1, 0)，且取这些值的概率依次为1/6, 1/3, 1/12, 5/12，试求[tex=0.857x1.0]N7iCrOsS+NNEUUlnsYCi1g==[/tex]与[tex=0.643x1.0]O+viFNA0oHTwnBtQyi80Zw==[/tex] 各自的边际分布列．
- >>>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']
- 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}