I'm a student变复数形式

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• 已知复数z=（m-1）+（/2m-1／-2）i（m∈r）在复平面上对应的点位于第三象限,求m的取值 具体点,写下已知复数z=（m-1）+（/2m-1／-2）i（m∈r）在复平面上对应的点位于第三象限,求m的取值 具体点,写下来
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