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de moivre's question help (1 Viewer)

rndmprsn

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can someone pls help I have no clue what to do for parts b onwards

Screen Shot 2023-10-29 at 4.21.06 pm.png
thanks in advance
 

Yueyue

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For part d, there’s probably a better way but it’s the same as (sum of roots)^2 -2(sum of product of 2 roots)
 
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