Indian Institute of Foreign Trade 2017 Solved Paper

Question : 61 of 114

Marks: +1, -0

If f(x) =

1/{1+\x}

, then find the value of f[f{f(x)}], at x = 5

Solution:

Choice (B) Using the given function

f ( 5 ) = 1 / 6

f ( f ( 5 ) ) = { 1 } /{ 1 + 1 / 6 } = 6 / 7

f ( f ( f ( 5 ) ) ) = { 1 } /{ 1 + 6 / 7 } = { 7 }/ { 13 }

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