My Math Forum Function :- Domain Range Problem

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 May 25th, 2019, 06:09 AM #1 Member   Joined: Jul 2017 From: KOLKATA Posts: 50 Thanks: 3 Function :- Domain Range Problem Let f: D --> R be defined as f(x) = (x^2 + 2x + a)/ (x^2 + 4x + 3a) , where D and R denote domain of f and set of all real nos. respectively . If f is surjective mapping then the range of a is ?
 May 26th, 2019, 12:34 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,966 Thanks: 2216 As the range of a doesn't include 0 or 1, I suspect it is (0, 1).

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