JEE Main 2021 · 26 August · Evening Shift · Mathematics · Complex Number
D. x2−(3−1)x−3=0{x}^{2} - ( \sqrt{3} - 1 ) x - \sqrt{3} = 0x2−(3−1)x−3=0
(3+i)100=299(p+iq)( \sqrt{3} + i{)}^{100} = {2}^{99} ( p + iq )(3+i)100=299(p+iq)
2100(cosπ6+isinπ6)100=299(p+iq){2}^{100}{\left(cos\dfrac{\pi}{6} + isin\dfrac{\pi}{6}\right)}^{100} = {2}^{99}\left(p + iq\right)2100(cos6π+isin6π)100=299(p+iq)
2100ei50π3=299(p+iq){2}^{100}{e}^{i\dfrac{50\pi}{3}} = {2}^{99}\left(p + iq\right)2100ei350π=299(p+iq)
2(cos50π3+isin50π3)=p+iq2\left(cos\dfrac{50\pi}{3} + isin\dfrac{50\pi}{3}\right) = p + iq2(cos350π+isin350π)=p+iq
2(cos(17π−π3)+isin(17π−π3))=p+iq2\left(\cos \left(17\pi - \dfrac{\pi}{3}\right) + isin\left(17\pi - \dfrac{\pi}{3}\right)\right) = p + iq2(cos(17π−3π)+isin(17π−3π))=p+iq
2(−cosπ3+isinπ3)=p+iq2\left(- cos\dfrac{\pi}{3} + isin\dfrac{\pi}{3}\right) = p + iq2(−cos3π+isin3π)=p+iq
2(−12+i32)=p+iq2\left(\dfrac{- 1}{2} + \dfrac{i\sqrt{3}}{2}\right) = p + iq2(2−1+2i3)=p+iq
p=−1 and q=3p = - 1 \text{ and } q = \sqrt{3}p=−1 and q=3
ppp and qqq Roots of the equationx2−(3−1)x−3=0{x}^{2} - ( \sqrt{3} - 1 ) x - \sqrt{3} = 0x2−(3−1)x−3=0