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If b(n+1)=1/(1-bn)forngeq1a n db1=b3, t ...

If `b_(n+1)=1/(1-b_n)forngeq1a n db_1=b_3, t h e nsum_(r=1)^(2001)b r^ 2001` is equal to `2001` b. `-2001` c. `0` d. none of these

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By the question, `b_2= 1/(1−b_1)` ​
​`b _3 =2/(1-b_2)` ​
Given `b_3=b_1`
​`⟹b_3=b_1=1/(1−b _2)` ...
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