Question

Let α and β be two real roots of the equation (k + 1) tan²x - √2. λtanx = (1 - k), where k(≠ - 1) and λ  are real numbers. If tan²(α + β) = 50, then a value of  λ is;

(1) 5

(2) 10

(3) 5√2

(4) 10√2

Answer 1

Answer is  (2) 10

Answer 2

Answer is (2) 10