Use the symbolic features of MATLAB to find an expression
Chapter 2, Problem P2.56(choose chapter or problem)
Use the symbolic features of MATLAB to find an expression for the equivalent resistance for the network shown in Figure P2.56. (Hint: First, connect a 1-A current source across terminals a and b. Then, solve the network by the node-voltage technique. The voltage across the current source is equal in value to the equivalent resistance.) Finally, use the subs command to evaluate for R1 = 15 , R2 = 15 , R3 = 15 , R4 = 10 , and R5 = 10 .
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