Function
A function- a rule taking taking certan numbers as inputs- assigns to each a definite output number
DOMAIN- set of all inputs (input numbers)
Input=number plugged into function-independent variable
RANGE-result of domain (result of inputs)
Function metaphore-vending machine-juicer-computer with different commands will have results
Function
e.g.
1/ F(x)= x+1
Input 1
Output: x+1 =1+1=2
Domain x or R=(- vo cung, +vo cung)
R is all real numbers
Range: R=(-vo cung, +vocung)
-vo cung and +vo cung are not numbers so they are not considered inputs
Types of functions: Quadratic? Linear? Polynomials?
Vertex? Articulate? Union of these two intervals
2/ F(x)= x^2
Domain: R=(-vo cung, +vocung)
Range: [0,+vocung)
because
0^2=0, all negative and positive numbers ^2 would be positive
3/
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