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April 19th, 2011, 06:30 AM  #1 
Newbie Joined: Apr 2011 Posts: 1 Thanks: 0  non constant entire function
which is the correct answer of following problem. give proper reason in support of your answer. (1) Let f be a nonconstant entire function such that f (z) = 1 for every z with z = 1. Then (A) f has a zero in the open unit disc. (B) f always has a zero outside the closed unit disc. (C) f need not have any zero. (D) any such f has exactly one zero in the open unit disc. 
April 20th, 2011, 09:33 AM  #2 
Senior Member Joined: Jun 2010 Posts: 618 Thanks: 0  Re: non constant entire function
snjvsingh, What have you tried so far? Ormkärr 

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