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Functions of Random Variables                                   127

                                         f Y (y)




                                       0.4


                                       0.2


                                                               y
                         –4      –2               2      4





                    Figure 5.6 Probability density function, f (y) in Example 5.4


                                                     Y
                                            r 0


                                 +     i
                              V                         R
                                 –



                              Figure 5.7  Circuit for Example 5.5



                             f (r )
                             R




                            0.1





                                                            r(ohms)
                                      90        110




                          Figure 5.8 Distribution, f (r), in Example 5.5


                                               R




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