设 [tex=6.429x1.571]MqOfsQLAB/zeVSdv1WggGOHrt6nBB+k2oFK7hHfnjsoLDobMkGMa/4bnGpViMVB1gh0vucEpwE62GWEf1ZvUeQ==[/tex], 证明 : [tex=5.714x1.571]MqOfsQLAB/zeVSdv1WggGGqT1kl1KZa+FwJ2GqTuOVRr/uVICwG5efNYVuN5PHLe[/tex] .
举一反三
- 设 [tex=6.429x1.571]MqOfsQLAB/zeVSdv1WggGOHrt6nBB+k2oFK7hHfnjspBvOs/nieUlqpcytzsaKXvNH1RDtIb2zbvDzGpDPkenA==[/tex], 问是否成立 [tex=5.714x1.571]MqOfsQLAB/zeVSdv1WggGGqT1kl1KZa+FwJ2GqTuOVRr/uVICwG5efNYVuN5PHLe[/tex]?
- 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．
- [tex=5.0x1.571]MqOfsQLAB/zeVSdv1WggGEBR/QFOVnXfRHI4LGW6kKErAiyBMCREOzy7eLxA5+Hj[/tex] 未知类型：{'options': ['0', '[tex=0.786x2.357]IwJCUxQJz+qfVDVP2eUlNg==[/tex]', '1', '3'], 'type': 102}
- 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}
- 【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]