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Most Important Selected Qs for JEE AdvancedMathematicsQuadratic Equation

Paragraph: A polynomial equation is given by 2 x^4+k x^3+22 x^2+k x+2=0 . On the basis of above information, answer the following questions : Question: Interval of k for which there are no real roots of the equation can be -

Options

  1. Ak [-10,10]
  2. Bk [3,13]
  3. Ck (-13,-11]
  4. Dk [0,13)

Correct answer

A. k [-10,10]

Step-by-step solution

aligned & D of 2 t ^2+ kt +18=0 is 0 & k ^2-144 0 & k (-12,12) aligned

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