matlab

I need to the solution of this example on Matlab. I try to solve, but stucked in the 3-uçlu (uçlu means outputs) nodal. How can i solve this problem?

I want to understand what is the reason for this circuit and each part of it? Can you explain this?

Hello everyone, I was trying to make a plot with two graphs. One is dashed another is simple line. I can't create a dashed line in Octave? Is there anyone who could do it with Octave? Tell me how? Thanks in advance!!