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Question 49 of 52

Q.Let A=[1234]A = \begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix} and B=[−11−20]B = \begin{bmatrix} -1 & 1 \\ -2 & 0 \end{bmatrix}. Match the matrix on the left column with the matrix on the right column. Then choose the correct option. Left column:

(i) A+ATA + A^T;
(ii) (A+B)T(A + B)^T;
(iii) (AB)T(AB)^T;
(iv) B+BTB + B^T. Right column:
(a) [−2−1−10]\begin{bmatrix} -2 & -1 \\ -1 & 0 \end{bmatrix};
(b) [2558]\begin{bmatrix} 2 & 5 \\ 5 & 8 \end{bmatrix};
(c) [0134]\begin{bmatrix} 0 & 1 \\ 3 & 4 \end{bmatrix};
(d) [−5−1113]\begin{bmatrix} -5 & -11 \\ 1 & 3 \end{bmatrix}.
(a) (i)-(a), (ii)-(c), (iii)-(d), (iv)-(b)
(b) (i)-(b), (ii)-(c), (iii)-(a), (iv)-(d)
(c) (i)-(b), (ii)-(c), (iii)-(d), (iv)-(a)
(d) (i)-(b), (ii)-(d), (iii)-(c), (iv)-(a)
West Bengal WbchseWest Bengal HS (WBCHSE) Board 2026MCQ· 1mImportance★★★★★
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Compute each of the four matrices and match; the correct assignment is (i)-(b), (ii)-(c), (iii)-(d), (iv)-(a).

Matrix operations and the transpose rules (A+B)T=AT+BT(A+B)^T=A^T+B^T, (AB)T=BTAT(AB)^T=B^TA^T are exactly the CBSE/NCERT Class 12 matrices topics tested here.

  1. A+AT=[1234]+[1324]=[2558]A+A^T = \begin{bmatrix}1&2\\3&4\end{bmatrix}+\begin{bmatrix}1&3\\2&4\end{bmatrix} = \begin{bmatrix}2&5\\5&8\end{bmatrix} — matches (b).
  2. A+B=[0314]A+B = \begin{bmatrix}0&3\\1&4\end{bmatrix}, so (A+B)T=[0134](A+B)^T = \begin{bmatrix}0&1\\3&4\end{bmatrix} — matches (c). …

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