In this lesson we teach you how to add and subtract complex numbers, and what this means geometrically (shown on graphs drawn in Geogebra).
In this lesson we define the set of complex numbers and we also show you how to plot complex numbers onto a graph.
In this lesson we learn how to simplify powers of imaginary numbers e.g. simplify i^33+i^40 Interesting stuff! Requires knowledge of index laws.
In this lesson we discover the imaginary number i which is equal to the square root of negative 1. We then apply the imaginary number in solving equations involving the square root of a negative number.
In this lesson we talk about the classification of numbers into different sets called natural numbers, whole numbers, integers, and real numbers. We will investigate deeper into this matter next lesson.
In this lesson we talk about how to find the intersection, union and complement of sets.
In this video we introduce you to Venn Diagrams, an important concept in set theory. We also talk about how to put some real life information into a venn diagram. We will talk more about how the venn diagram relates to set theory in the next lesson.
In this lesson we do a quiz testing the knowledge you have learned from the last two lessons – is an element of, is a subset of, finite, infinite, cardinality etc.
In this lesson we learn about what a set is, and the symbol for “is an element of” and how to use that symbol.
You have two sets which contain the same elements but their order is different. Are they the same set?