Question

What is a matrix?

(a) Group of elements

(b) Array of elements

(c) Group of columns and rows

(d) Array of numbers

This question was posed to me in an online quiz.

This interesting question is from Matrix Algebra in division Matrix Algebra and Gaussian Elimination of Finite Element Method

Answer 1

Correct option is (b) Array of elements

Explanation: A matrix is an array of elements. The matrix A is denoted as [A]. An element located in the ith row and j th column is denoted as aij. A matrix is a collection of numbers arranged into a fixed number of rows and columns.