CBSE Class 12 Mathematics Question Paper 2013

CBSE CLASS XII Questions

• 1.

  Sports car racing is a form of motorsport which uses sports car prototypes.The competition is held on special tracks designed in various shapes. 

  

  The equation of a sports car racing track is given as: \[ f(x)= \begin{cases} x^4-4x^2+4, & 0\leq x<3,\\ x^2+40, & x\geq 3 \end{cases} \] Based on this information:

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• 2.

  Find: \[ \int \frac{x^2}{(x^2+9)(x^2+16)}\,dx \]

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• 3.

  If \[ \frac{d}{dx}(F(x))=\frac{1}{e^x+1}, \] then find \(F(x)\), given that \[ F(0)=\log\left(\frac{1}{2}\right). \]

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• 4.

  If \[ B(\operatorname{adj} B)= \begin{bmatrix} \frac{1}{3} & 0 & 0\\ 0 & \frac{1}{3} & 0\\ 0 & 0 & \frac{1}{3} \end{bmatrix}, \] then the value of \[ \det(B^{-1}) \] is: 

  • \(\frac{1}{3}\)
    
  • \(\frac{1}{9}\)
    
  • \(3\)
    
  • \(9\)
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• 5.

  The domain of \[ f(x)=\cos^{-1}(2x-5) \] is: 

  • \([-1, 1]\)
    
  • \([4, 6]\)
    
  • \([-7, -3]\)
    
  • \([2, 3]\)
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• 6.

  A function \[ f:\mathbb{R}-\left\{\frac{3}{5}\right\} \to \mathbb{R}-\left\{\frac{3}{5}\right\} \] is defined as \[ f(x)=\frac{3x+2}{5x-3}. \] Show that \(f\) is one-one and onto.

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