证明下列逻辑蕴含式或推理不成立[tex=5.857x1.0]Tf+I4I9mkqCOFdbTbojyG43cqbI+OUMi515v7b4AkbKC4dMaO9N9ZxzqbCb24L1c[/tex]
举一反三
- 以下程序段实现的输出是()。for(i=0;i<;=9;i++)s[i]=i;for(i=9;i>;=0;i--)printf("%2d",s[i]);[/i][/i] A: 9 7 5 3 1 B: 1 3 5 7 9 C: 9 8 7 6 5 4 3 2 1 0 D: 0 1 2 3 4 5 6 7 8 9
- 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: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
- 若排列38i7j625为奇排列,则i=( ),j=( ). A: i=1,j=4 B: i=4,j=1 C: i=4,j=9 D: i=9,j=4
- 以下程序的输出结果是___________。for i in range(1,11): print(i, end = " ") A: 1 2 3 4 5 6 7 8 9 B: 1 2 3 4 5 6 7 8 9 10 C: 1 2 3 4 5 D: 1 3 5 7 9
- 已知两点M(5,3,2)、N(1,-4,6),则与同向的单位向量可表示为:() A: {-4,-7,4} B: {-4/9,-7/9,4/9) C: {4/9,7/9,-4/9} D: {4,7,-4}