Let Sα = x, y : y2 ≤ 

Subject

Mathematics

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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11.

Let Sα = x, y : y2  x, 0  x  α and Aαis area of the region Sα. If for a λ, 0 n< λ < 4, Aλ : A4 = 2 : 5, then λ equals :

  • 242513

  • 442513

  • 22513

  • 42513


B.

442513

Aα = 20αxdx = 43αα AλA4 = 25  λ32 = 165


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12.

The vector equation of the plane through the line of intersection of the planes x + y + z = 1 and 2x + 3y + 4z = 5 which is perpendicular to the plane x – y + z = 0 is :

  • r . i^ - k^ + 2 = 0

  • r . i^ - k^ - 2 = 0

  • r × i^ - k^ + 2 = 0


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