You know that |z-z1|=r^2 is a circle with centre z1 and radius r.
What would |z-z1|<r^2 look like? What about |z-z1|>r^2? How can you use that in your question?
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What would |z-z1|<r^2 look like? What about |z-z1|>r^2? How can you use that in your question?
Posted from TSR Mobile
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