求微分方程组[img=211x69]17da6536b48167e.png[/img]的特解Y= ( ) 。
A: 4*exp(t)
B: 2*exp(t)
C: exp(t)
D: 8*exp(t)
A: 4*exp(t)
B: 2*exp(t)
C: exp(t)
D: 8*exp(t)
举一反三
- 求微分方程组[img=214x69]17da65379afb919.png[/img]的特解X= ( ) 。 A: -exp(t) B: exp(x) C: -exp(x) D: exp(t)
- 用Matlab求解常微分方程初值问题[img=191x61]1802e4db6ff00c5.png[/img],输出结果是: A: 2*exp(t)+4*t*exp(-t)+1 B: 2*exp(-t)+4*t*exp(-t)-1 C: 2*exp(-t)+4*t*exp(-t)+1 D: 2*exp(t)+4*t*exp(-t)-1
- 求微分方程[img=269x55]17da6536a9fba07.png[/img]的通解; ( ) A: (C15*sin(2*t))/exp(3*t) + (C16*sin(2*t))/exp(3*t) B: (C15*cos(2*t))/exp(3*t) - (C16*sin(2*t))/exp(3*t) C: (C15*cos(2*t))/exp(3*t) + (C16*cos(2*t))/exp(3*t) D: (C15*cos(2*t))/exp(3*t) + (C16*sin(2*t))/exp(3*t)
- 一阶常微分方程[img=152x26]1802e4d6075ee4f.png[/img]的通解为 A: sin(2*t)/5-cos(2*t)/10+C*exp(-4*t) B: sin(2*t)/7+cos(2*t)/5-C*exp(-3*t) C: sin(2*t)/7-C*cos(2*t)/10+C*exp(-2*t) D: sin(2*t)/7-cos(2*t)/7+C*exp(-5*t)
- 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')