[D=egin{vmatrix}a^2&(a+1)^2&(a+2)^2&(a+3)^2\b^2&(b+1)^2&(b+2)^2&(b+3)^2\c^2&(c+1)^2&(c+2)^2&(c+3)^2\d^2&(d+1)^2&(d+2)^2&(d+3)^2\end{vmatrix}=]______
举一反三
- \[D=\begin{vmatrix}a^2&(a+1)^2&(a+2)^2&(a+3)^2\\b^2&(b+1)^2&(b+2)^2&(b+3)^2\\c^2&(c+1)^2&(c+2)^2&(c+3)^2\\d^2&(d+1)^2&(d+2)^2&(d+3)^2\\\end{vmatrix}=\]______
- 表达式（2&1==？1：-1和（（2&==？1：-1的表达式值分别是（）。 A: -1和1 B: 1和1 C: 1和2 D: -1和2
- 设`alpha_{1}， alpha_{2}，alpha_{3}`均为3维列向量，记矩阵(A=egin{bmatrix}alpha_{1} ，& alpha_{2} ，& alpha_{3}end{bmatrix})，(B=egin{bmatrix}alpha_{1}+alpha_{2}+alpha_{3} ， & alpha_{1}+2alpha_{2}+4alpha_{3} ， & alpha_{1}+3alpha_{2}+9alpha_{3} end{bmatrix}，) 如果(egin{vmatrix} A end{vmatrix}=1，)那么(egin{vmatrix} B end{vmatrix})=______
- 设集合A ={1, 2, 3}, 下列关系R中哪些是等价关系？A、{<1, 1>, <2, 2>, <3, 3>}B、{<1, 1>, <2, 2>, <3, 3>, <3, 2>, <2, 3>}C、{<1, 1>, <2, 2>, <3, 3>, <1, 3>}D、{<1, 1>, <2, 2>, <1, 2>, <2, 1>, <1, 3>, <3, 1>, <3, 3>, <2, 3>, <3, 2>}
- 设集合A={1, 2, 3}, 不是A上的等价关系。 A: {(1, 1), (2, 2), (3, 3)} B: {(1, 1), (2, 2), (3, 3), (1, 3), (3, 1)} C: {(1, 1), (2, 2), (3, 3), (2, 3)} D: {(1, 1), (2, 2), (2, 3), (3, 2), (2, 1), (1, 2), (3, 3), (1, 3), (3, 1)}