jee-main 2020 Q52

jee-main · India · session2_04sep_shift2 Complex Numbers Arithmetic Roots of Unity and Cyclotomic Expressions
If $a$ and $b$ are real numbers such that $( 2 + \alpha ) ^ { 4 } = a + b \alpha$, where $\alpha = \frac { - 1 + i \sqrt { 3 } } { 2 }$, then $a + b$ is equal to:
(1) 9
(2) 24
(3) 33
(4) 57
If $a$ and $b$ are real numbers such that $( 2 + \alpha ) ^ { 4 } = a + b \alpha$, where $\alpha = \frac { - 1 + i \sqrt { 3 } } { 2 }$, then $a + b$ is equal to:\\
(1) 9\\
(2) 24\\
(3) 33\\
(4) 57