જો $z^2 + z + 1 = 0$ હોય,જ્યાં $z$ એ સંકર સંખ્યા છે,તો $\left( z + \frac{1}{z} \right)^2 + \left( z^2 + \frac{1}{z^2} \right)^2 + \left( z^3 + \frac{1}{z^3} \right)^2 + \dots + \left( z^6 + \frac{1}{z^6} \right)^2$ ની કિંમત શોધો.

  • A
    $18$
  • B
    $54$
  • C
    $6$
  • D
    $12$

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જો $\omega$ એ એકમનું ઘનમૂળ દર્શાવતું હોય અને $\sum_{k=1}^n\left(k+\frac{1}{\omega}\right)\left(k+\frac{1}{\omega^2}\right)=340$ હોય,તો $n=$

જો $\alpha$ અને $\beta$ એ સમીકરણ $x^2+2x+2=0$ ના બીજ હોય,તો $\alpha^{15}+\beta^{15}=$

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

જો $\sin \theta + 2\sin \phi + 3\sin \psi = 0$ અને $\cos \theta + 2\cos \phi + 3\cos \psi = 0$ હોય,તો $\cos 3\theta + 8\cos 3\phi + 27\cos 3\psi = $ ની કિંમત શોધો.

${\left( \frac{-1 + i\sqrt{3}}{2} \right)^{20}} + {\left( \frac{-1 - i\sqrt{3}}{2} \right)^{20}} = $

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