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Question 1, Review Exercise 1

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(b) negative * %%(c)%% $0$ * (d) cannot be determined \\ <btn type="link" collapse="a4">See ... tn><collapse id="a4" collapsed="true">(D): cannot be determined </collapse> v. If $z=x+iy$ and $|\df

Question 8, Exercise 1.2

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at $z$ is pure imaginary, then its real part will be zero, that is, $a=0$. Using it in (1), we get $$