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Pre Calc-Chapter 0
Chapter 0
31
Mathematics
11th Grade
08/21/2014

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Term
Set
Definition
A collection of objects or numbers, often shown usig braces { } and usually named by a capital letter
Term
Element
Definition
Each object or number in a set; Each entry in a matix
Term
Subset
Definition
If every element of set B is contained in set A, then B is a subset of A
Term
Universal Set
Definition
The set of all possible elements for a situation
Term
Complement
Definition
The complement of an event A consists of all the outcomes in the sample space that are not included as outcomes of event A
Term
Union
Definition
The union of sets A and B is all elements in both A and B, written as A υ B
Term
Intersection
Definition
The intersection of sets A and B is all elements foundin both A and B, written as A ∩ B
Term
Empty set
Definition
A set with no elements, sembolized be {} or Ø
Term
Imaginary Unit
Definition
i, or the principal square root of -1
Term
Complex #
Definition
Any # that can be written in the form a + bi, where a and b are real #'s and i is the imaginary unit
Term
Standard Form
Definition
A complex # written in the form of a + bi
Term
Imaginary #
Definition
Another name for a complex # or the form a + bi, when b≠0
Term
Complex conjugates
Definition
Two complex #'s of the form a + band a - bi, where b ≠0
Term
Parabola
Definition
The locus of points in a plane that are equidistant from a fixed point, called the focus, and a specific line, called the directrix
Term
Axis of Symmetry
Definition
A line about which a figure is symmetric. In a parabola, the axis of symmetry is perpendicular to the directrix and passes through the focus
Term
Vertex
Definition
The common endpoint of two or more noncollinear rays; A point at which a parabola intersects its axis of symmetry; The two endpoints of the major axis of an ellipse
Term
Completing the square
Definition
A process used to make a quadratic expression into a perfect square trinomial
Term
nth root
Definition
For any real # a and b, and any positive integer n, if a= b, than a is an nth root of b
Term
Principal nth root
Definition
The nonnegative nth root
Term
System of equations
Definition
A set of equations with the same variables
Term
Substitution method
Definition
A method of solving a sstem of equations in which one equation is solved for one variable in terms of the other
Term
Elimination Method
Definition
Eliminate one of the variables in a system of equations by adding or subtracting the equation
Term
Matrix
Definition
Any rectangular array of variables or contants in horizontal rows and vertical columns
Term
Dimension
Definition
A description of the number of rows and columns of a matrix
Term
Experiment
Definition
A situation involving chance or probability that leads to specific outcomes
Term
Factorial
Definition
If n is a positive integer, then n!=n(n-1)(n-2) •...• 2x1
Term
Permutation
Definition
An arrangement of objects in which order is important
Term
Combination
Definition
An arrangement of objects in which order is not important
Term
Measure of central tendency
Definition
A number that represents the center or middle of a set of data
Term
Measures of spread
Definition
A representation of how spread out or scattered a set of data is
Term
Frequency Distribution
Definition
A table used to organize data by groups, classes, or intervals
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