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If omega is an imaginary cube root of un...

If `omega` is an imaginary cube root of unity, then the value of `(1+ omega- omega^(2))(1- omega + omega ^(2))` is-

A

1

B

2

C

4

D

8

Text Solution

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 2
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  3. If omega is an imaginary cube root of unity, then the value of (1+ ome...

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  4. The roots of the equation x^(2)-(1-2i) x-2i =0 are -

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  5. State which of the following is not true:

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  8. If S(n) =nP +1/2 n (n-1) Q, where S(n) is the sum of first n terms of ...

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  9. In n parallel lines in a plane are intersected by a family of m parall...

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  10. If 0 le x le 1, then the minimum value of (x^(2) +x+1)is-

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  11. How many terms are there in the expansion of (4x+7y)^(10) +(4x-7y)^(10...

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  12. If u(1) =sqrt2, u(2) =sqrt(2sqrt(2)), u(3) =sqrt(2sqrt(2sqrt2)),... th...

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  13. The real values of x and y for which the complex numbers 9y^(2)-4- 10 ...

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  14. The value of (2 ^(1/4). 4 ^(1/8)8^(1/16)...oo)is-

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  15. If omega is a complex number such that omega ^(3) =1, then the value o...

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  16. The first three terms in the expansion of (1+ ax) ^(n) are 1, 6x and ...

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  17. A coin an a six faced die both unbiased are thrown simulaneously. The ...

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  18. The sum of the series (1)/(sqrt1+sqrt2)+ (1)/(sqrt2+ sqrt3)+ ...+ (1)/...

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  19. Solution set of the inequation 10 le -5 (x-2) lt 20 is-

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  20. If the cube roots of unity are 1, omega, omega ^(2) then the roots of ...

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