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Most Important Selected Qs for JEE AdvancedMathematicsApplication of Derivatives

Paragraph: Let x^4+4 x^3-8 x^2+p=0 be an equation Question: Values of p when all roots are real

Options

  1. A0 p 3
  2. Bp 3 and p 0
  3. C3 p 128
  4. Dnone of these

Correct answer

A. 0 p 3

Step-by-step solution

aligned & x^4+4 x^3-8 x^2+p=0 & f(x)=4 x^3+12 x^2-16 x=0 & x=0,-4,1 aligned _ x f(x)= = _ x - f(x)

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