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    Complex Numbers-roots of unity

    Could someone explain how to work these sort of questions out please? even when i look at the answers i don't understand haha <a href="http://www.codecogs.com/eqnedit.php?latex=if~ \omega ~ is~a~complex~cube~root~of~unity,show~that~ (1@plus;\omega )^3(1@plus;2\omega@plus;2\omega^2)=1"...
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    Integration Question

    Hi, would anyone be able to do this question for me and let me no the answer they get :) For some reason the photo won't upload Integral x^2sqrt(a^2-x^2) dx between 0 and a
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    ATAR Estimate Please (:

    Hi was just wondering what you guys thought my ATAR would be roughly.. English (standard) - 28/250 Engineering Studies - ~5/16 Physics - 20/82 Maths Ext 1 - 7/52 Maths Ext 2 - =10/11 School Rank 114
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