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If `alpha` and `beta` are the roots of equation (k+1) `tan^(2)x-sqrt2lambda, tan=1-k and tan^(2)(alpha+beta)=50`. Find the value of `lambda`

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If `alpha` and `beta` are the roots of equation (k+1) `tan^(2)x-sqrt2lambda, tan=1-k and tan^(2)(alpha+beta)=50`. Find the value of `lambda`
A. 10
B. 5
C. 7
D. 12
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Correct Answer - A
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