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If f(x)=(x)/(x+1),Which of the following...

If `f(x)=(x)/(x+1)`,Which of the following is/are CORRECT.
(A) `f(f(2020))=(2020)/(4041)`
(B) `f(f(f(2020)))=(2020)/(8081)`
(C) `f(f(f(f(2020))))=(2020)/(2321)`
(D) `f(f(f(f(f(2020)))))=(2020)/(10101)`

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