Please answer this :

2.  Consider an infinite ladder network shown in figure. A voltage is applied between points A and B. If  the voltage is halved after each section, fine the  ratio R 1 R 2 .

a     1                         b     3 4                               c     1 2                                             d     1 4

Dear Student,
                        Let current I  enters trough A and it will be get divided in  two equal parts means I/2
                       means current through R2 is I/2 
                      according to question

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