### Unit 1 – Matrices & Determinants Class Ix Mathematics Notes for FBISE

#### Unit Number 1 – Matrices & Determinants

According to the FBISE syllabus, Class 9 math notes consist of solved exercises, review questions, MCQ, board questions, and chapter reviews. Class 9th maths Federal Board of Intermediate and Secondary Education Notes.

The Federal Board of Intermediate and Secondary Education, commonly known as FBISE, is the Government of Pakistan Board for Pakistan International Schools for the examination of intermediate and secondary education in Pakistan and abroad. Wikipedia

- 1.1 Exercise

Question 1. Find the order of the following matrices.

**1.2**

**Question Number 2 From the following matrices, identify unit matrices, row matrices, column matrices, and null matrices.**

**1.3**

Question Number 3: Which of the following matrices are conformable for an addition?

**1.4**

Questions Number 4. Which of the following product of matrics is conformable for multiplication?

**1.5**

Question Number 5. find the determination of the following matrices.

**1.6**

Question Number 6. Use matrices, if possible, to solve the following systems of linear equation by

1. The matric inversion method 2. the Cramer’s rule

**Review Exercise:**