Mathematics
If a matrix A = and matrix B = , then which of the following is possible : 1. A + B 2. A - B 3. AB 4. BA
Answer
Since, addition and subtraction of matrices requires each matrix to be of same order.
∴ A + B and A - B are not possible.
AB is possible because no. of columns in A (2) is equal to no. of rows in B (2).
BA is not possible because no. of columns in B (1) is not equal to no. of rows in A (2).
Hence, Option 3 is the correct option.