The set of all real values of \( \lambda \) for which the quadratic...

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The set of all real values of \( \lambda \) for which the quadratic
\( P \) equation, \( \left(\lambda^{2}+1\right) x^{2}-4 \lambda x+2=0 \) always have

W exactly one root in the interval \( (0,1) \) is
(1) \( (-3,-1) \)
(2) \( (2,4] \)
(3) \( (0,2) \)
(4) \( (1,3] \)
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