If [a c 0; b d 0; 0 0 5] is a scalar matrix, then the value of a + 2b + 3c + 4d is:

Question

MCQ (Single)Diagonal Matrix and Scalar MatrixCBSE PYQ

Loading...

If the sum of all the elements of a 3 × 3 scalar matrix is 9, then the product of all its elements is :

Assertion (A) : Every scalar matrix is a diagonal matrix. Reason (R) : In a diagonal matrix, all the diagonal elements are 0.

Diagonal Matrix and Scalar Matrix

The product of matrix P and Q is equal to a diagonal matrix. If the order of matrix Q is 3 × 2, then order of matrix P is :

The number of all scalar matrices of order 3, with each entry – 1, 0 or 1, is :