Matrices

Question 1

• Reduces complicated systems of equations to simple expressions
• Adaptable to systematic method of mathematical treatment and well suited to computers

Answer 1

Matrix

Question 2

is a set or group of numbers arranged in a square or rectangular array enclosed by two brackets

Answer 2

Matrix

Question 3

The number of rows may be any integer but the number of columns is always 1

Answer 3

Column matrix or vector

Question 4

Any number of columns but only one row

Answer 4

Row matrix or vector

Question 5

Contains more than one element and number of rows is not equal to the number of columns

Answer 5

Rectangular matrix

Question 6

The number of rows is equal to the number of columns

Answer 6

Square matrix

Question 7

A square matrix where all the elements are zero except those on the main diagonal

Answer 7

Diagonal matrix

Question 8

A diagonal matrix with ones on the main diagonal

Answer 8

Unit or Identity matrix - I

Question 9

All elements in the matrix are zero

Answer 9

Null (zero) matrix - 0

Question 10

A square matrix whose elements above or below the main diagonal are all zero

Answer 10

Triangular matrix

Question 11

A square matrix whose elements below the main diagonal are all zero

Answer 11

Upper triangular matrix

Question 12

A square matrix whose elements above the main diagonal are all zero

Answer 12

Lower triangular matrix

Question 13

A diagonal matrix whose main diagonal elements are equal to the same scalar

A scalar is defined as a single number or constant

Answer 13

Scalar matrix

Question 14

Two matrices are said to be equal only when all
corresponding elements are equal

Therefore their size or dimensions are equal as well

Answer 14

EQUALITY OF MATRICES

Question 15

the number of columns of A must equal the number of rows of B

Answer 15

conformable