已知[img=251x50]180356781379e74.png[/img]，求初值y(0)=___________
举一反三
- 已知因果序列x(n)的z变换为[img=221x47]18033fa6a935369.png[/img]，求相应序列的初值x(0)=______ A: -1 B: 0 C: 1 D: 1/2
- 已知[img=241x34]17da5c90f939f96.jpg[/img]求[img=57x19]17da5c91060fc2b.jpg[/img]=______(用分式x/y表达)
- 已知因果序列x(n)的z变换[img=283x27]18033fa862ade79.png[/img]，其初值x(0)=？ A: -1 B: 0 C: [img=18x14]18033fa86ad1e61.png[/img] D: 1
- 已知xy≠0且[img=100x23]17da5ce1f65da8d.jpg[/img]，则有( ) A: xy;0 B: x>;0，y>;0 C: x;0
- 如下命令中不能实现如下微分方程组[img=327x203]17e443a5d83ce02.png[/img]，在初值条件[img=172x112]17e443a5e2ead01.png[/img]下的特解求解的是： A: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1', 'y(0)=0', 't') B: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1, y(0)=0', 't') C: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1', 'y(0)=0') D: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1', 'y(0)=0', 'x')