Is Thevenin’s theorem applicable to both AC and DC circuits? In your opini

 
Is Thevenin’s theorem applicable to both AC and DC circuits?
In your opini

 
Is Thevenin’s theorem applicable to both AC and DC circuits?
In your opinion, when finding the Thevenin equivalent as seen by  the load for the below circuit, would it be easier to use source  transformation or Superposition? Provide both solutions and explain your  approach.