CT Model, Linear system

Thread Starter


Joined Aug 29, 2012
This question really question me, please help me out

Show that CT model, ady/dt+by(t)=x(t), represents a linear system; that is if x1(t)=y1(t) and x2(t)=y2(t), show that the response y3(t)=a1y1(t)+a2y2(t). Correspond to the linear combination of two inputs, x3(t)=a1x1(t)+a2x2(t)

I wish someone can explain to me about the way how it get to the answer


Joined Feb 24, 2006
You take the derivative of y, make the substitutions and show that the equation is a true statement. What's the problem? Haven't you done this type of exercise before in trigonometry?