若某连续时间LTI系统的冲激响应[img=160x25]1802d4fde913467.png[/img]，则该系统的单位阶跃响应[img=30x25]1802d4fdf1568a8.png[/img]为( )
A: [img=111x25]1802d4fdfb565f0.png[/img]
B: [img=110x25]1802d4fe03af98c.png[/img]
C: [img=132x25]1802d4fe0c71a10.png[/img]
D: [img=195x25]1802d4fe157eb27.png[/img]
A: [img=111x25]1802d4fdfb565f0.png[/img]
B: [img=110x25]1802d4fe03af98c.png[/img]
C: [img=132x25]1802d4fe0c71a10.png[/img]
D: [img=195x25]1802d4fe157eb27.png[/img]
举一反三
- 若某连续时间LTI系统的冲激响应[img=160x25]1803e2c4435adb7.png[/img]，则该系统的单位阶跃响应[img=30x25]1803e2c44cbd79a.png[/img]为( ) A: [img=111x25]1803e2c455ebf73.png[/img] B: [img=110x25]1803e2c45db4f40.png[/img] C: [img=132x25]1803e2c466a6aeb.png[/img] D: [img=195x25]1803e2c46f63dff.png[/img]
- 若某连续时间LTI系统的冲激响应[img=160x25]1802d50225d9942.png[/img]，则该系统的单位阶跃响应[img=30x25]1802d5022ede5a0.png[/img]为( ) A: [img=111x25]1802d5023739d81.png[/img] B: [img=110x25]1802d5023f63b2c.png[/img] C: [img=132x25]1802d5024837c2a.png[/img] D: [img=195x25]1802d50251241dc.png[/img]
- 求不定积分[img=121x54]17da653839aa6ae.png[/img]； （ ） A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
- 已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ，则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]
- 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]