Need solution for RD Sharma maths class 12 chapter Algebra of matrices exercise 4.3 question 20
Answer: Hence proved,
Hint: Matrix multiplication is only possible, when the number of columns of first matrix is equal to the number of rows of second matrix.
Given: and I is the identity matrix of order 3
Consider, LHS side
Now consider RHS
Then put the values in the equation, we get.
From equation i & equation ii