📐 Chapter 1 · Complex Numbers
Question
What is the modulus rule for products and quotients?
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Answer
$|z_{1}z_{2}|=|z_{1}||z_{2}|$ and $\left|\dfrac{z_{1}}{z_{2}}\right|=\dfrac{|z_{1}|}{|z_{2}|}$, so moduli may be taken piece by piece.
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