Question

if a and b are imaginary cube roots of unity,then a4+b4+1/ab=0 ​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

a and b are imaginary cube roots of unity.

so a=w (omega) and b=w^2

so a^4+b^4+1/ab=w^4+(w^2)^4+(1/w*w^2)

=w^4+w^8+(1/w^3)

=w+w^2+(1/1)

=1+w+w^2=0