In this video we'll explore what sets are, and we'll tell you what some of the key symbols and letters mean so you know which in-depth videos to look for: N, Q, Z, R, U, intersection, etc.
Basic Set Rules
This video focuses on sets and elements, along with a bunch of typical questions which a teacher can use to get tricky on the test. Special cases, what to do when both sets have the same members, what's an element of what, etc.
"R" you've probably seen before, the big cursive script-looking R that means "real numbers". The other three represent the integers, natural counting numbers, and rational numbers which form the basis of set-builder notation.
This video covers how to determine if one set is a subset of anther one, and the types of word problems you can get from these problems. It also covers a few trick questions, such as whether a set is a subset of itself or an identical set.
Set Builder vs Interval Notation
This is the big bad voodoo daddy of set notation. If you're not at least in Algebra 2 or College Algebra you probably won't cover this, but if you do cover set builder notation, it's a topic that really sets teachers apart from each other. Some teachers are real sticklers for being "proper" with their math, and they'll beat this topic into the ground. The more student-friendly teachers will teach you this but move on because they know it's unnecessarily confusing for most students.
Union vs Intersection
This video uses lots of types of examples to illustrate the union and intersection between sets: word problems, Venn diagrams, and your old friend "sets A and B".
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)