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If a m p(z1z2)=0a n d|z1|=|z2|=1,t h e n...

If `a m p(z_1z_2)=0a n d|z_1|=|z_2|=1,t h e n` `z_1+z_2=0` b. `z_1z_2=1` c. `z_1=z _2` d. none of these

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