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- GCE O-Level Maths
- Set Theory

Still Confused?

Try reviewing these fundamentals first.

Nope, I got it.

That's that last lesson.

Start now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started Now- Intro Lesson11:09
- Lesson: 1a4:30
- Lesson: 1b2:00
- Lesson: 1c1:47
- Lesson: 1d1:38
- Lesson: 2a1:35
- Lesson: 2b1:41
- Lesson: 2c2:12

A set is a collection of elements (usually numbers)

E.g. {$x \in R | x$ > 0} should be read as “the set of all x’s that are an element of the real numbers such that x is greater than 0.”

Special symbols:

- $R$ = real numbers

- $Z$ = integers

- $N$ = natural numbers

- $Q$ = rational numbers

- $C$ = complex numbers

- $I$ = imaginary numbers

- Introduction
__Introduction to Set Builder Notation__i. What are sets?

ii. Why do we need set builder notations?

- 1.
**Translating Intervals On Number Lines Into Set Builder Notation Form**Translate the following intervals into set builder notation form.

a)b)c)d) - 2.
**Evaluating the Domains of Expressions in Set Builder Notation Form**What are the domains for the following expressions? Write the answers in set builder notation form.

a)$\frac{1}{x}$b)$\sqrt x$c)$\frac{2}{x^{2} - 4}$