举一反三
- Not every linear transformation from [img=22x19]1803b6a8affc14b.png[/img]to [img=25x19]1803b6a8b9210ff.png[/img]is a matrix transformation.
- If P is an[img=44x19]1803b6aa96e88c4.png[/img] matrix with orthogonal columns, then[img=72x23]1803b6aa9ec8a8d.png[/img]
- Let A be a 4×4 matrix, the determinant of A is 1/3, and [img=21x20]1803c4e4937ebc3.png[/img] the adjoint matrix of A, then [img=115x27]1803c4e49b725a2.png[/img]=________. A: 1 B: 3 C: 6 D: 9
- Let [img=99x19]1803c4e7d6c70bb.png[/img] be a linear transformation. If A is the standard matrix representation of [img=13x19]1803c4e7de70caa.png[/img], then an [img=44x19]1803c4e7e5f3add.png[/img] matrix B will also be a matrix representation of L if and only if B is similar to A.
- 设随机变量X服从b(2,p)分布,随机变量Y服从b(3,p)分布。若[img=90x41]17e441ea7c518a0.png[/img] 则[img=63x26]17e441ea85da5ea.png[/img]= A: 8/27 B: 4/9 C: 19/27 D: 5/9
内容
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Which of the following statement is false? A: If[img=77x23]1803b6aa763b00a.png[/img], where[img=77x23]1803b6aa7e8aab9.png[/img] and D is a diagonal matrix, then B is a symmetric matrix. B: An orthogonal matrix is orthogonally diagonalizable. C: An[img=44x19]1803b6aa8680eb5.png[/img]symmetric matrix has n real eigenvalues. D: An[img=44x19]1803b6aa8680eb5.png[/img]symmetric matrix hasnlinearly independent eigenvectors.
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The columns of any [img=40x20]1803b6a907d8a6a.png[/img] matrix are linearly dependent.
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19、不等式[img=129x24]18031ef3b487214.png[/img]的解集为{x|x＞3或x＜2}
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An[img=49x19]1803b6aafbee947.png[/img] matrix A has orthonormal columns if and only if[img=59x23]1803b6ab03fb852.png[/img].
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判断float型变量x是否满足[img=77x19]1803bce8616286c.png[/img]的正确的表达式是？ A: 6.0 < x < 8.0 B: 6 < x && x < 8 C: !(x <= 6 && x >= 8) D: 6.0 < x || x < 8.0