NCERT Solutions for Class 11 Maths Chapter 2 Exercise 2.3

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Class 11 Maths NCERT Solutions Chapter 2 Relations and Functions Exercise 2.3 is based on the following concepts: 

  1. Some functions and their graphs (Identity function, Constant function, Polynomial function, Rational functions, Modulus function, Signum function, Greatest integer function)
  2. Algebra of real functions (Addition of Two Real Functions, Subtraction of a real function from another, Multiplication by a scalar, Multiplication of two real functions, Quotient of two real functions)

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CBSE CLASS XII Related Questions

  • 1.

    For the given Linear Programming Problem, shade the feasible region on the graph and write the coordinates of the corner points.

    Minimize \(Z = 5x + 7y\)

    subject to constraints

    \[ 2x + y \geq 8 \]

    \[ x + 2y \geq 10 \]

    \[ x,\ y \geq 0. \]


      • 2.

        Solve the differential equation \( (x+y)\,dy + (x-y)\,dx = 0 \), given that \( y(1) = 1 \).


          • 3.

            Differential of \( \log \sin x \) with respect to \( \sqrt{\cos x} \) is :

              • \( -2\sqrt{\cos x}\cdot\cot x\cdot\operatorname{cosec} x \)
              • \( \sqrt{\cos x}\cdot\cot x\cdot\operatorname{cosec} x \)
              • \( \frac{2\sqrt{\cos x}}{\sin x} \)
              • \( \frac{1}{\sin x\sqrt{\cos x}} \)

            • 4.

              Find the value of \(x\) if \(A = B\), where

              \[ A = \begin{bmatrix} 6 & 3x \\ 8 & -6 \end{bmatrix} \text{ and } B = \begin{bmatrix} 6 & x^2+2 \\ 8 & x^2-5x \end{bmatrix}. \]


                • 5.

                  For the following Linear Programming Problem, shade the feasible region on the graph and find the coordinates of its corner points :

                  Minimize \(Z = 18x + 10y\)

                  subject to constraints

                  \[ \begin{aligned} 4x + y &\ge 20 \\ 2x + 3y &\ge 30 \\ x, y &\ge 0. \end{aligned} \]


                    • 6.

                      Find the product of the maximum and minimum values of the function \( f(x) = \cos x - \frac{1}{2}\cos 2x,\ x \in \left[0, \frac{\pi}{2}\right] \).

                        CBSE CLASS XII Previous Year Papers

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