The solution method outlined in the previous paragraphs can become quite
complicated for circuits containing a large number of elements; in particular, one
may need to solve higher-order differential equations if more than one energy-storage
element is present in the circuit. A simpler and preferred method for the
solution of AC circuits will be presented in the next section. This brief section
has provided a simple, but complete, illustration of the key elements of AC circuit
analysis. These can be summarized in the following statement