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If alpha is a non real root of the equat...

If `alpha` is a non real root of the equation `x^(6)-1=0` then `(alpha^(2)+alpha^(3)+alpha^(4)+alpha^(5))/(alpha+1)`

A

`alpha`

B

1

C

0

D

`-1`

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DIPTI PUBLICATION ( AP EAMET)-DE MOIVRE'S THEOREM-EXERCISE 1
  1. If alpha, beta are the non-real cube roots of 2, then alpha^(6)+beta^...

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  2. If alpha is a non-real root of x^(6)-1=0 then (alpha^(5)+alpha^(3)+alp...

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  3. If alpha is a non real root of the equation x^(6)-1=0 then (alpha^(2)+...

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  4. If 1,alpha1,alpha2,…..alpha(n-1) are the n^(th) roots of unity then (1...

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  5. If 1,alpha1,alpha2,…..alpha(n-1) are the n^(th) roots of unity and n i...

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  6. 1,alpha1,alpha2,alpha3…..alpha(n-1) are the n^(th) roots of unity and ...

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  7. If 1,z1z2,……z(n-1) are the n^th roots of unity, then (1-z1)(1-z2)…..(1...

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  8. If alpha is an n^(th) root of unity then prove that 1+2alpha+3alpha^2+...

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  9. If 1,alpha,alpha^2,…...,alpha^(n-1) are the n^(th) roots of unity, the...

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  10. Statement-I : If xn=cos(pi//2^n)+isin (pi//2^n) then x1.x2.x3…..=-...

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  11. If X(n)="cos"(pi)/(2^(n))+"isin"(pi)/(2^(n)), then x(1), x(2), x(3)......

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  12. If x(n)=cos((pi)/(4^(n)))+i sin ((pi)/(4^(n))), then x(1), x(2), x(3)....

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  13. sum(k=1)^6[sin((2kpi)/(7))-icos((2kpi)/(7))]=

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  14. If z(k)=cos((kpi)/(10))+isin((kpi)/(10)), then z(1)z(2)z(3)z(4) is equ...

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  15. The cube roots of 1+I are

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  16. The values of (1-sqrt3i)^(1//3) are

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  17. Find all the values of (sqrt3 + i) ^(1/4) .

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  18. The product of the four values of (1/2+i(sqrt3)/(2))^(3//4) is

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  19. The product of the values of [cos""(pi)/(3)+isin""(pi)/(3)]^(3//4) is

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  20. The product of the distinct (2n)^(th) roots 1+isqrt3 is

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