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[" 12.The points "P,Q" denote the comple...

[" 12.The points "P,Q" denote the complex numbers "z_(1),z_(2)" in the argand diagram.O "],[" is the origin.If "z_(1)bar(z)_(7)+bar(z)_(1)z_(z)=0," show that "/_POQ=90^(@)" ."]

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