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Most Important Selected Qs for JEE AdvancedMathematicsApplication of Derivatives

Let y=x^4+9 x^3+a x^2+9 x+4 contain four collinear points then find the maximum value of [ a 5 ] (where [.] denotes the greatest integer function)

Correct answer

6

Step-by-step solution

d y d x =4 x^3+27 x^2+2 x x+9 y^ =12 x^2+54 x+2 a should have real and distinct roots D 0 a 243 8

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