NCERT Solutions for Differential Equations Exercise 9.2 Solutions

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Class 12 Maths NCERT Solutions Chapter 9 Differential Equations Exercise 9.2 is provided in the article. Class 12 Chapter 9 Differential Equations Exercises include questions on Order and Degree of Differential Equations.

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CBSE CLASS XII Related Questions

  • 1.
    Using integration, find the area of the region bounded by the curve \( y = x|x| \), the x-axis, and the vertical lines \( x = -2 \) and \( x = 2 \).


      • 2.
        Find the vector and cartesian equations of the line passing through the point of intersection of the lines \( \vec{r} = (\hat{i} + \hat{j} - \hat{k}) + \lambda(3\hat{i} - \hat{j}) \) and \( \vec{r} = (4\hat{i} - \hat{k}) + \mu(2\hat{i} + 3\hat{k}) \) and parallel to the line \( \frac{x - 1}{-2} = \frac{7 - y}{-3} = z \).


          • 3.
            Which of the following equations is NOT a Linear Differential Equation?

              • \((1 + x^2) \, dy + 2xy \, dx = \cot x \, dx\)
              • \(y + \frac{d}{dx}(xy) = x(\sin x + \log x)\)
              • \(x(1 + y^2) \, dx - y(1 + x^2) \, dy = 0\)
              • \(y \, dx - (x + 3y^2) \, dy = 0\)

            • 4.
              Find:

              The shortest distance between the lines: \[ \vec{r}=(4+\lambda)\hat{i}+(2\lambda-1)\hat{j}-3\lambda\hat{k} \] and \[ \vec{r}=(1+2\mu)\hat{i}+(4\mu-1)\hat{j}+(2-5\mu)\hat{k} \]


                • 5.
                  Find:

                  If \[ (3\hat{i}-2\hat{j}+5\hat{k})\times(4\hat{i}+p\hat{j}+q\hat{k})=\vec{0} \] then find the values of \(p\) and \(q\).

                    • \(p = -\frac{2}{3}, \, q = \frac{5}{3}\)
                    • \(p = -\frac{8}{3}, \, q = \frac{20}{3}\)
                    • \(p = \frac{20}{3}, \, q = -\frac{8}{3}\)
                    • \(p = 0, \, q = 0\)

                  • 6.

                    A carpenter needs to design a wooden box in the shape of a cuboid such that the sum of its length and breadth is 3 cm more than its height. Twice of its length, thrice of its breadth and its height add up to 10 cm. Its breadth added to 7 times its height is 1 cm less than 3 times its length. 

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