Question 5. Suppose that f is holomorphic on C and satisfies |f(z)| → ∞ as |z|→ Prove that f is surjective. Here is a remarkable fact that is certainly not true of real differentiable functio You are asked to prove an existential assertion, i.e. that some point exists with a cert You of at thi ha C. ..h

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Question 5. Suppose that f is holomorphic on C and satisfies |ƒ(z)| → ∞ as |z|→∞.
Prove that f is surjective.
Here is a remarkable fact that is certainly not true of real differentiable functions.
You are asked to prove an existential assertion, i.e. that some point exists with a certain
property. You have no way of guessing what this point might be. So what is your
alternative strategy? You may assume the result of question 1(a) if you wish, although
you do not have to. This is from a 2002 Oxford exam paper.
Transcribed Image Text:Question 5. Suppose that f is holomorphic on C and satisfies |ƒ(z)| → ∞ as |z|→∞. Prove that f is surjective. Here is a remarkable fact that is certainly not true of real differentiable functions. You are asked to prove an existential assertion, i.e. that some point exists with a certain property. You have no way of guessing what this point might be. So what is your alternative strategy? You may assume the result of question 1(a) if you wish, although you do not have to. This is from a 2002 Oxford exam paper.
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