MCQ
${\left( {\frac{{ - 1 + i\sqrt 3 }}{2}} \right)^{20}} + {\left( {\frac{{ - 1 - i\sqrt 3 }}{2}} \right)^{20}} = $
- A$20\sqrt 3 i$
- B$1$
- C$\frac{1}{{{2^{19}}}}$
- ✓$ - 1$
$\therefore \,\,\,{(\omega )^{20}} + {({\omega ^2})^{20}} = {\omega ^{18}}.{\omega ^2} + {\omega ^{39}}.\omega = {\omega ^2} + \omega = - 1$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.