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

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CBSE CLASS XII Related Questions

1.
If A'= \(\begin{bmatrix} 3 & 4 \\ -1 & 2 \\ 0 &1 \end{bmatrix}\)\(\begin{bmatrix}  -1 & 2 & 1 \\ 1 &2 & 3\end{bmatrix}\) , then verify that 
(i) \((A+B)'=A'+B' \)
(ii) \((A-B)'=A'-B'\)

      2.

      If A=\(\begin{bmatrix}2&-1&1\\-1&2&-1\\1&-1&2\end{bmatrix}\)verify that A3-6A2+9A-4 I=0 and hence find A-1 

          3.
          Find the inverse of each of the matrices,if it exists. \(\begin{bmatrix} 2 &  3\\ 5 & 7 \end{bmatrix}\)

              4.

              Solve system of linear equations, using matrix method.
               x-y+2z=7
               3x+4y-5z=-5
               2x-y+3z=12

                  5.
                  If (i) A=\(\begin{bmatrix} \cos\alpha & \sin\alpha\\ -\sin\alpha & \cos\alpha \end{bmatrix}\),then verify that A'A=I
                  (ii) A= \(\begin{bmatrix} \sin\alpha & \cos\alpha\\ -\cos \alpha & \sin\alpha \end{bmatrix}\),then verify that A'A=I

                      6.
                      Let f: R→R be defined as f(x) = 3x. Choose the correct answer.

                        • f is one-one onto
                        • f is many-one onto
                        • f is one-one but not onto
                        • f is neither one-one nor onto
                        CBSE CLASS XII Previous Year Papers

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