Question

If a and b are imaginary cube roots of unity,
then the value of a4 + b28 + 1/ab is
​

Answer 1

Answer:

0

Step-by-step explanation:

cube roots of unity 1;a;b

x^3-1=0

product of roots =1×a×b

ab=1

sum of roots =a+b+1=0

a^3=1

b^27=1

therefore

the question becomes a+b+1=0

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