NCERT Solutions for Class 12 Maths Chapter 1 Relations and Functions Exercise 1.4

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CBSE CLASS XII Related Questions

  • 1.
    Find:

    If the function \[ f(x)= \begin{cases} \frac{\sin x}{x}+\cos x, & x\neq0\\ k, & x=0 \end{cases} \] is continuous at \(x=0\), then find the value of \(k\).

      • \(0\)
      • \(-2\)
      • \(-1\)
      • \(2\)

    • 2.
      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 \( x = 2 \).


        • 3.

          At a birthday party, children are being served orange juice in conical cups, as shown in the figure. 


          Each cup is 15 cm deep and has a radius 5 cm. The juice is being poured into this cup at a rate of 0·1 cm3/s.
          On the basis of the above information, answer the following questions :


            • 4.

              An NGO organises a charity event in which they decide to distribute woollen caps to protect children from winter. The caps to be distributed are in three separate boxes, Box I has 30 red caps, Box II has 20 red and 10 green caps, and Box III has 30 green caps. The probability that a Box i is selected and a cap picked out is i/6, where i = 1, 2, 3.  
              Based on the above information, answer the following questions :


                • 5.
                  Find: \[ \int \frac{x^2}{(x^2-1)(x^2+4)}\,dx \]


                    • 6.
                      Which of the following equations is NOT a Linear Differential Equation?

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

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