For all x ∈ R , if l x 2 – 9 l x + 5 l + 1 > 0, then l lies in the interval

Mathematics · Class 11 · CBSE — Complex Numbers and Quadratic Equations

For all x ∈ R, if lx2 – 9lx + 5l + 1 > 0, then l lies in the interval
  4. None of these

Answer

(A)

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