设二次型[img=289x27]1803a3128d7a946.png[/img],则下列选项( )是二次型的标准型,其中[img=139x25]1803a31296330fa.png[/img]
A: [img=140x27]1803a3129f3bbb3.png[/img]
B: [img=140x27]1803a312a7fbe2c.png[/img]
C: [img=140x27]1803a312b12cee8.png[/img]
D: [img=140x27]1803a312ba5b1c9.png[/img]
A: [img=140x27]1803a3129f3bbb3.png[/img]
B: [img=140x27]1803a312a7fbe2c.png[/img]
C: [img=140x27]1803a312b12cee8.png[/img]
D: [img=140x27]1803a312ba5b1c9.png[/img]
举一反三
- 设二次型[img=289x27]18031c680662394.png[/img],则下列选项( )是二次型的标准型,其中[img=139x25]18031c680ecec8c.png[/img] A: [img=140x27]18031c6817bd9cb.png[/img] B: [img=140x27]18031c6820088e1.png[/img] C: [img=140x27]18031c6828fce21.png[/img] D: [img=140x27]18031c68317d1fb.png[/img]
- 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
- 函数[img=121x37]17e4390faefecbb.png[/img]的极值为() A: 在x=-2处取极大值27 B: 在x=-2处取极小值27 C: 在x=-3处取极小值27 D: 在x=-3处取极大值27
- 微分方程[img=135x26]18038fdaa595877.png[/img] 的通解是( ) A: [img=150x27]18038fdaae2fc2a.png[/img] B: [img=140x27]18038fdab61504a.png[/img] C: [img=134x25]18038fdabe1d707.png[/img] D: [img=140x27]18038fdac5e2f9f.png[/img]
- 已知系统状态方程为:[img=182x65]18031d895bc8cc1.png[/img]能使闭环系统极点配置为-1,-2,-3的状态反馈阵为() A: [img=150x27]18031d89634bdc9.png[/img] B: [img=140x27]18031d896bf2c20.png[/img] C: [img=150x27]18031d8975d2aad.png[/img] D: [img=140x27]18031d897ea7c63.png[/img]