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IKMC 2012 - Grades 11-12 - Paper 01 - Self-study Question 8

IKMC · IKMC 2012 - Grades 11-12 - Paper 01 - Self-study

Question 8

Which function satisfies the equation $f(1/x)=1/f(x)$ (where the expressions are defined)?
  1. $f(x)=2/x$
  2. $f(x)=1/(x+1)$
  3. $f(x)=1+1/x$
  4. $f(x)=1/x$
  5. $f(x)=x+1/x$