Sequences Flashcards
1
Q
What is the meaning of these letters?
- Z
- Z^+
- Z^-
- Z<0^+ (Base 0)
A
- Z = Set of all integers
- Z^+ = Set of all (+) integers
- Z^- = Sets of all (-) integers
- Z<0^+ = Set of all (+) integers & 0
2
Q
What is the meaning of these letters?
- Q
- R
- d
- r
- a
A
- Q = Set of Rational numbers
- R = Set of Real numbers
- d = Common Difference
- r = Common ratio
- a = First term
3
Q
What type of brackets do you use for
- Sets
- Sequences
A
- Sets = Curly brackets
- Sequences = No brackets or very rarely () but not often
4
Q
Whats the difference between a sequence and a set?
A
Set is a collection of numbers (elements) where terms cannot be repeated
Sequence is an ordered list of numbers (Terms) that may follow a pattern (doesn’t have to)
5
Q
n = 4
What does that mean?
A
4th term
6
Q
What is an arithmetic sequence?
A
Sequence with a common difference (d)
7
Q
How do you find the common ration (if there is one)
A
U2 / U1 or U10 / U9 etc
8
Q
What is the common ratio?
A
Ratio between each pair of consecutive terms (when it is the same each time)
9
Q
A
