Chapter 3.2, Problem 9E

(Electrical eng.) The combined resistance of three resistors connected in parallel, as shown in Figure 3.7, is given by this formula:

$combinedresis\tan ce=\frac{1}{\left(\frac{1}{R_1}\right)\left(\frac{1}{R_2}\right)\left(\frac{1}{R_3}\right)}$

Using this formula, write a C++ program to calculate and display the combined resistance when the three resistors R1 = 1000, R2 = 1000, and R3 = 1000 are connected in parallel. The output should produce this display:

The combined resistance is xxxx.xx ohms

The xxxx.xx denotes placing the calculated value in a field width of seven columns, with two positions to the right of the decimal point.