A: [img=88x51]18033944934cba7.png[/img]
B: [img=74x51]180339449c26101.png[/img]
C: [img=88x51]18033944a4eff7b.png[/img]
D: [img=88x51]18033944acb18cc.png[/img]
举一反三
- 二次型[img=99x26]18033943a43997a.png[/img]所对应的矩阵是哪个？ A: [img=88x51]18033943ace4e95.png[/img] B: [img=74x51]18033943b443192.png[/img] C: [img=88x51]18033943bd29569.png[/img] D: [img=74x51]18033943c65dd19.png[/img]
- 求二次型[img=139x27]18032636d2e8477.png[/img]的矩阵。 A: [img=60x51]18032636dbbe2b2.png[/img] B: [img=88x51]18032636e4d461b.png[/img] C: [img=74x51]18032636ede3f11.png[/img] D: [img=74x51]18032636f653f32.png[/img]
- 二次型[img=187x51]1803df7d3823058.png[/img],其中[img=103x28]1803df7d414f1aa.png[/img]对应的矩阵是 A: [img=60x51]1803df7d4913249.png[/img] B: [img=60x51]1803df7d50b5b22.png[/img] C: [img=88x51]1803df7d57f1e66.png[/img] D: [img=88x51]1803df7d61177d9.png[/img]
- 二次型[img=187x51]18031764efef478.png[/img],其中[img=103x28]18031764f89ee7d.png[/img]对应的矩阵是 A: [img=60x51]1803176501507ee.png[/img] B: [img=60x51]180317650a48109.png[/img] C: [img=88x51]18031765123e993.png[/img] D: [img=88x51]180317651b7cea2.png[/img]
- 在实数域上与[img=98x51]18033943baf80c2.png[/img]合同的矩阵是 A: [img=88x51]18033943c3a96d5.png[/img] B: [img=88x51]18033943cc09ea0.png[/img] C: [img=88x51]18033943d563fa0.png[/img] D: [img=60x51]18033943df8ccd5.png[/img]
内容
- 0
矩阵 是二次型[img=122x27]1803df7d401d270.png[/img]的矩阵 A: [img=88x51]1803df7d47b58fa.png[/img] B: [img=60x51]1803df7d4f9e073.png[/img] C: [img=60x51]1803df7d57c4d4e.png[/img] D: [img=60x51]1803df7d60782ce.png[/img]
- 1
矩阵 是二次型[img=122x27]1803176519395aa.png[/img]的矩阵 A: [img=88x51]1803176521b89a6.png[/img] B: [img=60x51]18031765295144f.png[/img] C: [img=60x51]18031765324c8be.png[/img] D: [img=60x51]180317653b4377c.png[/img]
- 2
令F(x):x是有理数,G(x):x是实数。将命题“所有的有理数都是实数,但有的有实数不是有理数”符号化为() 未知类型：{'options': ['17e0a83a4157352.jpgx(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))'], 'type': 102}
- 3
设A= [img=112x101]17d61d6849c091d.png[/img]，则代数余子式[img=26x25]17d61d68517d114.png[/img] = ( ) A: 99 B: -99 C: 88 D: -88
- 4
下列的推理结构中哪个是正确的推理形式()。 未知类型：{'options': ['([img=8x14]17e4385a99bb660.jpg[/img] x)P(x) ∧ ([img=8x14]17e4385a99bb660.jpg[/img]x)Q(x) → ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x) ∧Q(x))', ' ([img=8x14]17e4385a99bb660.jpg[/img] x)P(x) → ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x) ∧ Q(x))', ' ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x) ∨ Q(x)) → ([img=8x14]17e4385a99bb660.jpg[/img]x)P(x) ∨([img=8x14]17e4385a99bb660.jpg[/img]x)Q(x)', ' ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x)∨ Q(x)) → ([img=8x14]17e4385a99bb660.jpg[/img] x)P(x) ∧ ([img=8x14]17e4385a99bb660.jpg[/img] x)Q(x)'], 'type': 102}