已知线性定常系统的状态方程如下，状态反馈阵 [img=17x19]1803bc4eee512df.png[/img]（ ）使闭环系统极点配置为[img=160x22]1803bc4ef5f8dbc.png[/img]。[img=286x162]1803bc4f00da5a2.png[/img]
A: [img=160x27]1803bc4f09056b7.png[/img]
B: [img=170x27]1803bc4f112c0d4.png[/img]
C: [img=161x27]1803bc4f19cc2d1.png[/img]
D: [img=161x27]1803bc4f2224517.png[/img]
A: [img=160x27]1803bc4f09056b7.png[/img]
B: [img=170x27]1803bc4f112c0d4.png[/img]
C: [img=161x27]1803bc4f19cc2d1.png[/img]
D: [img=161x27]1803bc4f2224517.png[/img]
举一反三
- 设随机变量X的概率密度为[img=172x58]1802fe3273041d3.png[/img]则使得F{X > a} = F{X < a}成立，则a为( ). A: 2-1/4 B: 21/4 C: 1/2 D: 1-2-1/4
- 设[img=127x53]17f1b3d6db98b83.jpg[/img]，f（x）=arctanΧ，则[img=56x55]17f1b3d82842941.jpg[/img]=（）。 A: π B: 3π/4 C: -3π/4 D: 2π
- 已知y=f(x)是奇函数,当x≥0时,[img=62x34]17e0bf81aac3b63.png[/img],则f(-8)的值是( ) A: -8 B: -4 C: 4 D: 8
- 设正态分布N(0, 4)的分布函数为F(x)，则F’(x) = ( ). A: [img=73x63]1802f2c47707b95.png[/img] B: [img=86x65]1802f2c47feb07a.png[/img] C: [img=75x58]1802f2c4884644b.png[/img] D: [img=87x58]1802f2c48fffbbf.png[/img]
- 设正态分布N(0, 4)的分布函数为F(x)，则F’(x) = ( ). A: [img=73x63]1802f2a8aba67a6.png[/img] B: [img=86x65]1802f2a8b46de33.png[/img] C: [img=75x58]1802f2a8bcdd988.png[/img] D: [img=87x58]1802f2a8c497bb0.png[/img]