(零矩阵)[img=575x30]17e0be92e610a5a.png[/img]
A: a=3,b=2,c=1
B: a=-3,b=-2,c=7
C: a=3,b=-2,c=5
D: a=-3,b=2,c=7
A: a=3,b=2,c=1
B: a=-3,b=-2,c=7
C: a=3,b=-2,c=5
D: a=-3,b=2,c=7
举一反三
- (零矩阵)[img=575x30]17e43e6e56a8009.png[/img] A: a=3,b=2,c=1 B: a=-3,b=-2,c=7 C: a=3,b=-2,c=5 D: a=-3,b=2,c=7
- 谱例的实际演奏顺序是( )[img=980x110]17da6e2f65f1335.png[/img] A: 1 2 3 4 3 4 5 6 7 8 B: 1 2 3 4 5 6 7 8 1 2 C: 1 2 3 4 5 6 7 8 3 4 D: 1 2 3 4 5 6 7 8 1 2 3 4 3 4
- 【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]
- 下列MATLAB语句运行有误的是() A: A=[1 2;3 4];B=[3;7];AB B: A=ones(3,3);A(1,2:3)=[4,5] C: A=[2 3 5 7;9 4 6 1;7 3 2 5];B=[1 7;0 5];A(2:end,2:2:end)>B D: x=-5:5;y=-5:5;z=xx-yy
- 下列哪条语句是正确的( ) A: A=[1 2;3 4];B=[3;7];A.*B; B: A=cell(2,3);A(1,2)=[4;5]; C: A=[2 3 5 7;9 4 6 1;7 3 2 5];B=[1 7;0 5];A(2:end,2:2:end) D: x=-5:5;y=-5:5;z=x.*x-y.*y;surf(x,y,z);