COMEDK · Maths · 3. Complex Number
If \(\left(\dfrac{3}{2}+i \dfrac{\sqrt{3}}{2}\right)^{50}=3^{25}(x+i y)\), where \(x\) and \(y\) are real, then the ordered pair \((2 x, 2 y)\) is
- A \((1, \sqrt{3})\)
- B \((0,6)\)
- C \((0,-6)\)
- D \((-6,0)\)
Answer & Solution
Correct Answer
(A) \((1, \sqrt{3})\)
Step-by-step Solution
Detailed explanation
Let \(z = \dfrac{3}{2} + i \dfrac{\sqrt{3}}{2} = \sqrt{3} \left( \dfrac{\sqrt{3}}{2} + i \dfrac{1}{2} \right) = \sqrt{3} \left( \cos \dfrac{\pi}{6} + i \sin \dfrac{\pi}{6} \right) = \sqrt{3} e^{i \pi / 6}\). Then…
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