The techniques developed in chapter 2; i.e., combination series/parallel,
voltage divider and current divider are special techniques that are more
efficient than the general methods, but have a limited applicability.
It is to our advantage to keep them in our repertoire and use them when
 they are more efficient.
In this section we develop additional techniques that simplify
the analysis of some circuits.
In fact these techniques expand on concepts that we have
already introduced: linearity and circuit equivalence
THE METHODS OF NODE AND LOOP ANALYSIS PROVIDE POWERFUL TOOLS TO
DETERMINE THE BEHAVIOR OF EVERY COMPONENT IN A CIRCUIT