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How to solve infinite ladder resistance if I’m first loop it has 3 R and in scnd it has 2 2R and 1 1R . And so on the symmetry is carried forming a GP

How to solve infinite ladder resistance if I’m first loop it has 3 R and in scnd it has 2 2R  and 1 1R . And so on the symmetry is carried forming a GP

Grade:12

1 Answers

Vikas TU
14149 Points
4 years ago
The simple aproach to solve this is , first solve for first ladder and ten second ladder , after that you will find they will form a GP . then apply the formula for infinite GP sum , The sum woul be equal to a/(1-r) , and you will get the desired ans, 
Please upload photo of question , then i can solve it and clear your doubt, 
Hope this help 

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