复数(i-2)/(i+2)=?
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复数(i-2)/(i+2)=?
复数(i-2)/(i+2)=?
复数(i-2)/(i+2)=?
分母实数化,分子分母同×(i-2):(i-2)(i-2)/-5
整理得:(4i-3)/5
等于-5呀!