InterviewSolution
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Locate the complex number z such that `log_[cospi/6][ [|z-2| +5] /[4| z-2 | -4]] |
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Answer» `(t+5)/(4(t-1))>(sqrt3/2)^2` `(t+5)/(4(t-1)-3/4)>0` `(t+5-3t+3)/(4t-4)>0` `(8-2t)/(4(t-1))>0` `8-2t>0` `2t<8` `t<4` `|z-2|>1,|z-2|<4`. |
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