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# HELP with magnitude and imaginary numbers

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Let z and w be complex numbers satisfying $$\lvert z \lvert=4$$ and $$\lvert w \lvert=2.$$ . Enter in the numbers

$$|z+w|, |zw|, |z-w|, \left| \dfrac{z}{w} \right|$$

below, in the order listed above. If any of these cannot be uniquely determined from the information given, enter in a question mark.

May 19, 2021