Asked by Sinachi
Write z=1+√3i/2 in modulus arguement form. Hence evaluate z^8-2z^4-1
Answers
Answered by
oobleck
the roots of x^2-2x-1 are 1±√2
that makes z = ∜(1±√2) cis kπ/4, k=0..7
that makes z = ∜(1±√2) cis kπ/4, k=0..7
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