MCQ
${{\left( \frac{\sqrt{3}+i}{2} \right)}^{6}}+{{\left( \frac{i-\sqrt{3}}{2} \right)}^{6}}$is equal to [RPET 1997]
- ✓$-2$
- B0
- C2
- D1
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$(x - y +1)^2 + (2x + 2y - 6)^2 = 20$ on any tangent will be