序列{(2),-1,2,0}与序列{(2),3,-5,2}相乘为()
A: {(4),-3,-10,0}
B: {4,(2),-3,2}
C: {(2),-1,2,0}
D: {(2),3,-5,2}
A: {(4),-3,-10,0}
B: {4,(2),-3,2}
C: {(2),-1,2,0}
D: {(2),3,-5,2}
举一反三
- 序列{(2),-1,2,0}与序列{(2),3,-5,2}相加为() A: {(4),2,-3,2} B: {4,(2),-3,2} C: {(2),-1,2,0} D: {(2),3,-5,2}
- 【单选题】如图示代码,下面哪个是正确的输出结果 A. 0 1 2 3 4 5 B. 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 C. 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 D. 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5
- 【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]
- 点(-1,2,0)在平面x+2y-z+1=0上的投影为( ) A: (-5/3,-2/3,2/3) B: (5/3,2/3,-2/3) C: (-5/3,2/3,2/3 D: (5/3,-2/3,2/3)
- 以下对二维数组a初始化正确的语句是_。 A: int a[2][ ]={{0 , 1 , 2}, {3 , 4 , 5}}; B: int a[ ][3]={{0, 1, 2}, {3, 4, 5}}; C: int a[2][4]={{0, 1 , 2}, {3 , 4}, {5}} D: int a[ ][3]={{0, 1, 2}, { }, {3, 4}};