JEE MATHEMATICS MCQ: QUADRATIC EQUATIONS

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Application +4 | -1

2\alpha = - 1 - i\sqrt 3

and

2\beta = - 1 + i\sqrt 3

, then

5{\alpha ^4} + 5{\beta ^4} + 7{\alpha ^{ - 1}}{\beta ^{ - 1}}

is equal to

View answer and explanation

Correct option: D

Option D (2) is correct because, after substituting the given values of

\alpha

and

\beta

and simplifying, the expression evaluates to 2.

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x

a

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