2.1 Functions Flashcards
1
Q
Function
A
Describes a dependence of one quantity on another. It is a rule that we often give a name. (F,g,h,etc.)
A function is a rule that assigns to each element X in a set A exactly one element called f(x) in a set B.
2
Q
What is the set A called?
A
The domain (input)
3
Q
What is the set B called?
A
the range (output)
4
Q
What do you do when you square a number that is negative?
A
It becomes positive.
5
Q
What is 1/(x-4) in set builder notation?
A
{x|x≠4}
6
Q
What is 1/(x-4) in interval notation
A
(-∞,4)U(4,∞)
