设[tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex]是一随机变量,[tex=1.214x1.286]ywJhPpsrK/zutVlpmSO1aw==[/tex]为任意实数,[tex=1.714x1.286]p+zOLBbKURbVjWbmuQcavg==[/tex]为[tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex]的数学期望,则有[input=type:blank,size:6][/input] .
未知类型:{'options': ['[tex=12.429x1.286]q8HyMzYbNdS1m5JUH9I4P2hQkYCLaYrqtxCkFw7B/sNfba/3vR/wvSOSMJOWk78q[/tex]', '[tex=12.429x1.286]q8HyMzYbNdS1m5JUH9I4P2ulDzbX1WJGk5hIN2LNVZWDlNVuxPvZEsiV3Cup+6g7[/tex]', '[tex=12.429x1.286]q8HyMzYbNdS1m5JUH9I4P43nhMlotD7qMdvbP2wr7qcU8ZwIGcFbGu9PHX0MceTbQAQjho10ZtEiYsmPIVEROw==[/tex]', '[tex=7.214x1.286]q8HyMzYbNdS1m5JUH9I4P7W9T0H0r3AUr6X06QcrlSNOXiTxR1DoUbzN1GIHu6tj[/tex]'], 'type': 102}
未知类型:{'options': ['[tex=12.429x1.286]q8HyMzYbNdS1m5JUH9I4P2hQkYCLaYrqtxCkFw7B/sNfba/3vR/wvSOSMJOWk78q[/tex]', '[tex=12.429x1.286]q8HyMzYbNdS1m5JUH9I4P2ulDzbX1WJGk5hIN2LNVZWDlNVuxPvZEsiV3Cup+6g7[/tex]', '[tex=12.429x1.286]q8HyMzYbNdS1m5JUH9I4P43nhMlotD7qMdvbP2wr7qcU8ZwIGcFbGu9PHX0MceTbQAQjho10ZtEiYsmPIVEROw==[/tex]', '[tex=7.214x1.286]q8HyMzYbNdS1m5JUH9I4P7W9T0H0r3AUr6X06QcrlSNOXiTxR1DoUbzN1GIHu6tj[/tex]'], 'type': 102}
举一反三
- 以下程序的输出结果是() main( ) { int i , x[3][3]={9 , 8 , 7 , 6 , 5 , 4 , 3 , 2 , 1} , *p=&x[1][1] ; for(i=0 ; i<4 ; i+=2) printf("%d " , p[i]) ;
- 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}
- 设随机变量 [tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex] 服从参数 [tex=3.143x1.286]+YbFeYrJMNsGfJf0KraF7SPelDX5xgqsp9CtXCLBwA8=[/tex] 的指数分布,则 E(X)= [input=type:blank,size:4][/input], D(X) =[input=type:blank,size:4][/input].
- >>>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']
- 将一枚硬币重复投掷[tex=0.643x1.286]ZsZs11iKEvfmzDIurZth8g==[/tex]次,用[tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex]和[tex=0.857x1.286]h9C4nePGcGllh55hxKIsUw==[/tex]分别表示正面朝上和反面朝上的次数,则[tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex]和[tex=0.857x1.286]h9C4nePGcGllh55hxKIsUw==[/tex]的相关系数等于[input=type:blank,size:6][/input] . A: -1 B: 0 C: 1/2 D: 1