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scientific notation. a method of writing very large or very small numbers by using powers of 10. reciprocal. one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2. rational number. A number that can be written as a/b where a and b are integers, but b is not equal to 0. repeating decimal.
an equation written in the form y=mx+b is in slope-intercept form. The graph is a line with slope m and y-intercept b. the y-coordinate of the point where the line crosses the y-axis. y-y1 = m (x-x1), where m is the slope and (x1,y1) is the point the line is passing through. 50 flashcards of Algebra 1 terms. Enjoy!
This symbol means that both sets could have the same elements. (A ⊆ B). True or false? If A ⊂ B, B may have more elements than A. True or false? The total number of subsets of {A, B, C} is _____. Given the following sets, select the correct answer. Study with Quizlet and memorize flashcards containing terms like Set A = { X | X is an even ...
- Definition
- Notation
- Numerical Sets
- Why Are Sets Important?
- Some More Notation
- Equality
- Subsets
- Proper Subsets
- Even More Notation
- Empty (or null) Set
What is a set? Well, simply put, it's a collection. First we specify a common property among "things" (we define this word later) and then we gather up all the "things" that have this common property. For example, the items you wear: hat, shirt, jacket, pants, and so on. I'm sure you could come up with at least a hundred. This is known as a set. So...
There is a fairly simple notation for sets. We simply list each element (or "member") separated by a comma, and then put some curly brackets around the whole thing: This is the notation for the two previous examples: {socks, shoes, watches, shirts, ...} {index, middle, ring, pinky} Notice how the first example has the "..." (three dots together). S...
So what does this have to do with mathematics? When we define a set, all we have to specify is a common characteristic. Who says we can't do so with numbers? And so on. We can come up with all different types of sets. We can also define a set by its properties, such as {x|x>0} which means "the set of all x's, such that x is greater than 0", see Set...
Sets are the fundamental property of mathematics. Now as a word of warning, sets, by themselves, seem pretty pointless. But it's only when we apply sets in different situations do they become the powerful building block of mathematics that they are. Math can get amazingly complicated quite fast. Graph Theory, Abstract Algebra, Real Analysis, Comple...
Now you don't have to listen to the standard, you can use something like m to represent a set without breaking any mathematical laws (watch out, you can get πyears in math jail for dividing by 0), but this notation is pretty nice and easy to follow, so why not? Also, when we say an element a is in a set A, we use the symbol to show it. And if somet...
Two sets are equal if they have precisely the same members. Now, at first glance they may not seem equal, so we may have to examine them closely! And the equals sign (=) is used to show equality, so we write: A = B
When we define a set, if we take pieces of that set, we can form what is called a subset. In general: So let's use this definition in some examples. Let's try a harder example.
If we look at the defintion of subsets and let our mind wander a bit, we come to a weird conclusion. Let A be a set. Is every element of A in A? Well, umm, yes of course, right? So that means that A is a subset of A. It is a subset of itself! This doesn't seem very proper, does it? If we want our subsets to be proper we introduce (what else but) pr...
When we say that A is a subset of B, we write A B. Or we can say that A is not a subset of B by A B ("A is not a subset of B") When we talk about proper subsets, we take out the line underneath and so it becomes A B or if we want to say the opposite, A B.
This is probably the weirdest thing about sets. As an example, think of the set of piano keys on a guitar. "But wait!" you say, "There are no piano keys on a guitar!" And right you are. It is a set with no elements. This is known as the Empty Set(or Null Set).There aren't any elements in it. Not one. Zero. It is represented by Or by {}(a set with n...
- Writing a Set Using the Roster or Listing Method. Write a set consisting of your three favorite sports and label it with a capital SS. Answer. There are multiple possible answers depending on what your three favorite sports are, but any answer must list three different sports separated by commas, such as the following
- Identifying Well-Defined Sets. For each of the following collections, determine if it represents a well-defined set. The group of all past vice presidents of the United States.
- Representing the Empty Set Symbolically. Represent each of the following sets symbolically. The set of prime numbers less than 2. The set of birds that are also mammals.
- Writing a Finite Set Using the Roster Method and an Ellipsis. Write the set of even natural numbers including and between 2 and 100, and label it with a capital EE.
coefficient. The numerical value of a term. combine like terms. Adding or subtracting terms that have the same variable (s) and exponent (s). commutative property. Changing the order of addition or multiplication does not change the value. Ex: a+b+c = c+a+b. compound inequality. Two inequalities combined in one statement by the word "and" or "or".
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Sets Examples. Example 1: Find the elements of the sets represented as follows and write the cardinal number of each set. a) Set A is the first 8 multiples of 7 b) Set B = {a,e,i,o,u} c) Set C = {x | x are even numbers between 20 and 40} a) Set A = {7,14,21,28,35,42,49,56}. These are the first 8 multiples of 7.
