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Question: suppose that show that...

Question details

Suppose that \left | z_{3} \right | \neq \left | z_{4} \right |   show that \left | \frac{z_{1}+z_{2}}{z_{3}+z_{4}} \right | \leq \frac{\left | z_{1} \right | + \left | z_{2} \right |}{\left | \left | z_{3} \right | - \left | z_{4} \right | \right | }

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