Sunday, August 24, 2014

function

If f(x) = 1 – 1/x, then f(f(1/x)) = ....................



Answer: 
f(1/x) = 1 – x

= f(f(1/x)) = f( 1- x) 
= 1 – 1/(1 – x) 
= - x /(1 – x) 
= x/ (x – 1)
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