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Math 2 Unit 1A Vocabulary
Math 2 Unit 1A Vocabulary
20
Mathematics
10th Grade
07/11/2012

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Term
Arithmetic Sequence
Definition

a list of numbers in which the difference between each number is the same

 

 

 

Term
Arithmetic Series
Definition

 the sum of the first n terms of an arithmetic sequence

 

 

 

Term
an
Definition
the nth term of an arithmetic sequence
Term

 Sn

 

Definition
the nth partial sum in an arithmetic series
Term

 

Arithmetic Sequence Formula

 

Definition
an = a1 + (n-1)d
Term
Partial Sum of Arithmetic Series Formula
Definition
Sn = n/2(a1 + an)
Term
Imaginary Number
Definition
the square root a negative number; e.g. i = sqrt(-1)
Term
Pure Imaginary Number
Definition
a number in the form 0 + bi where b is a non-zero, real number
Term

Complex Number

 

Definition
a number in the form a + bi where a and b are real numbers
Term
i2
Definition
-1
Term
Complex Conjugate
Definition
For a + bi, it is a – bi.
Term
Standard Form of a Quadratic Equation
Definition

f(x) = ax2 + bx + c where a is not = 0

 

Term
Extrema
Definition
a point where a function attains a maximum or minimum; the vertex on a parabola
Term
Axis of symmetry
Definition
a line that passes through the vertex and splits the parabola into two symmetric parts; x = h for f(x) = a(x - h)2 + k
Term
Vertex Formula
Definition
(-b/(2a), f(-b/(2a)) for f(x) = ax2 + bx + c
Term
Vertex Form of a Quadratic Function
Definition
f(x) = +a(x + h)2 + k
Term
Intercept Form of a Quadratic Function
Definition

factored form; f(x) = a (x – p)(x – q) where p and q are x-intercepts

 

Term
X-intercept
Definition

 

where a graph crosses the x-axis; written in the form (x, 0)

 

Term
Zeroes of a Function
Definition
the x values where f(x) = 0; also called the roots or solutions
Term
Axis of Symmetry Formula
Definition

x = -b/(2a) for f(x) = ax2 + bx + c

 

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