A two-port network is defined by the relations I1 = 2V1

A two-port network is defined by the relations I₁ = 2V₁ + V₂, I₂ = 2V₁ + 3V₂ Then z₁₂ is

From the equations,

I₁ = 2V₁ +	(I₂ - 2V₁)
	3

⇒ V₁ = 3I₁ -	I₂
	4

∴ Z₁₂ =	1	Ω
	4