1.

Solve x^9-x^5+x^4-1=0

Answer»

`cispi/5,CIS(3pi)/(5),cispi,cis(7pi)/(5),cis(9pi)/(5),PM 1,pm i`
`cispi/3,cis(2pi)/(3),cispi,cis(7pi)/(3),cis(9pi)/(3),pm 1`
`cispi/2,cis(3pi)/(2),cispi,cis(7pi)/(2),cis(9pi)/(2),pm 1`
`1,i,cispi/2,cis(3pi)/(2),cispi,cis(7pi)/(2)`

Answer :A


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