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Mathematics - Quadratic Equation Question with Solution | TestHub

MathematicsQuadratic EquationTheory of equationsMedium2 minPYQ_2020
MathematicsMediumsingle choice

Letαandβbe two real roots of the equationk+1tan2x-2λtanx=1-k,wherek-1andλare real numbers. Iftan2α+β=50,then a value ofλis

Options:

Answer:
B
Solution:

k+1tan2x-2λtanx+k-1=0
tanα+tanβ=2λk+1
tanαtanβ=k-1k+1
tanα+β=2λk+11-k-1k+1=2λ2=λ2
tan2α+β=λ22=50
λ=±10

Stream:JEESubject:MathematicsTopic:Quadratic EquationSubtopic:Theory of equations
2mℹ️ Source: PYQ_2020

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