Mathematics

Mathematics

Problem

Let f(x)=x−1x+2f(x)=\dfrac{x-1}{x+2} with domain (−2,∞)(-2,\infty) (so that ff is one–one). Which of the following is the domain of f−1f^{-1}? a) (1,∞)(1,\infty) b) (−∞,1)∖{0}(-\infty,1)\setminus\{0\} c) (−∞,1)(-\infty,1) d) (−∞,0)(-\infty,0)

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