计算定积分:[tex=6.571x2.786]FBL40P9KHI4oMDwR1lzPHnGIFWwklw1MsdMH/A9/9+BD83JXP3jlUaVh0oQ27bCu[/tex]。
举一反三
- 以4,9,1为为插值节点,求\(\sqrt x \)的lagrange的插值多项式 A: \( {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) B: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) C: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x +1) + {1 \over {24}}(x - 4)(x - 9)\) D: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
- 同时掷2颗均匀骰子,X表示点数大于4出现的个数,则以下结果正确的是 A: X服从二项分布 B: P(X=0)=P(X=1) C: P(X=1)=4/9 D: P(X=0)=1/9 E: P(X=2)=4/9 F: P(X>;0)=1 G: P(X<;2)=5/9 H: P(X>;1)>;0.5
- 设A,B为两个事件,且P(A)>;0,若P(AB)=1/3,P(A)=2/3,则P(B|A)=( ) A: 1/2 B: 1/9 C: 2/9 D: 4/9
- 打印九九乘法表,要求格式为: 1*1=1 1*2=2 2*2=4 1*3=3 2*3=6 3*3=9 1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81 程序填空: #include void main() { int i,j; for(i=1; ;i++) { for(j=1; ;j++) printf("%d*%d=%d\t", ); ; } }
- 计算定积分∫上限9下限4(x^0.5/(x^0.5-1)dx