NCERT Solutions for Class 12 Maths Chapter 3 Matrices Exercise 3.1

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Class 12 Maths NCERT solutions chapter 3 Matrices Exercise 3.1 is covered in this article. Matrices along with the determinants have a weightage of 10 marks in the CBSE Examination. This Chapter 3 Matrices Exercise includes questions of order of matrix, types of matrices, and equality of matrices.

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CBSE CLASS XII Related Questions

  • 1.
    Solve the following linear programming problem graphically: Maximise \( Z = x + 2y \) Subject to the constraints: \[ x - y \geq 0 \] \[ x - 2y \geq -2 \] \[ x \geq 0, \, y \geq 0 \]


      • 2.
        Let the polished side of the mirror be along the line \[ \frac{x}{1} = \frac{1 - y}{2} = \frac{2z - 4}{6}. \] A point \( P(1, 6, 3) \), some distance away from the mirror, has its image formed behind the mirror. Find the coordinates of the image point and the distance between the point \( P \) and its image.


          • 3.
            The diagonals of a parallelogram are given by \( \mathbf{a} = 2 \hat{i} - \hat{j} + \hat{k} \) and \( \mathbf{b} = \hat{i} + 3 \hat{j} - \hat{k}\) . Find the area of the parallelogram.


              • 4.
                Solve the differential equation: \[ x^2y \, dx - (x^3 + y^3) \, dy = 0. \]


                  • 5.
                    Let $f'(x) = 3(x^2 + 2x) - \frac{4}{x^3} + 5$, $f(1) = 0$. Then, $f(x)$ is:

                      • $x^3 + 3x^2 + \frac{2}{x^2} + 5x + 11$
                      • $x^3 + 3x^2 + \frac{2}{x^2} + 5x - 11$
                      • $x^3 + 3x^2 - \frac{2}{x^2} + 5x - 11$
                      • $x^3 - 3x^2 - \frac{2}{x^2} + 5x - 11$

                    • 6.
                      Let $f(x) = |x|$, $x \in \mathbb{R}$. Then, which of the following statements is incorrect?

                        • $f$ has a minimum value at $x = 0$
                        • $f$ has no maximum value in $\mathbb{R}$
                        • $f$ is continuous at $x = 0$
                        • $f$ is differentiable at $x = 0$
                      CBSE CLASS XII Previous Year Papers

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