જો $1, \alpha_1, \alpha_2, \ldots, \alpha_{n-1}$ એ એકમના $n^{\text{th}}$ મૂળ હોય,તો $\sum_{1 \leq i < j \leq n-1} \alpha_i \alpha_j =$

  • A
    $1$
  • B
    $0$
  • C
    $-1$
  • D
    $i$

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Similar Questions

જો $\alpha_1, \alpha_2, \ldots, \alpha_{23}$ એ એકમના $23^{rd}$ મૂળ હોય,તો $\alpha_1^{47} + \alpha_2^{47} + \ldots + \alpha_{23}^{47} = $

જો $z = \sin \theta - i \cos \theta$ હોય, તો કોઈપણ પૂર્ણાંક $n$ માટે

$\sum\limits_{k = 1}^6 {\left( {\sin \frac{{2\pi k}}{7} - i\cos \frac{{2\pi k}}{7}} \right)} $ નું મૂલ્ય શું છે?

જો $1, \omega, \omega^2$ એ એકમના ઘનમૂળ હોય,તો $(x+y)^2+(x \omega+y \omega^2)^2+(x \omega^2+y \omega)^2$ ની કિંમત શોધો.

જો $z = {\left( {\frac{{\sqrt 3 }}{2} + \frac{i}{2}} \right)^5} + {\left( {\frac{{\sqrt 3 }}{2} - \frac{i}{2}} \right)^5}$ હોય,તો

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