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若f(z)=2z+▔z-3i,f(▔z+i)=6-3i,试求f(-z)
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若f(z)=2z+▔z-3i,f(▔z+i)=6-3i,试求f(-z)
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答案和解析
f(z+i)=2(z+i)+(z+i)-3i=3z=6-3i,所以z=2-i
f(-z)=-2+i
f(-z)=-2+i
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