Maths

A give an example of a function whose domain equals the set of real numbers and whose range equals the set?
the set {-1,0,1}
BGive an example of a function whose domain equals (0,1)and whose range equals [0,1]
C.Give n example of a function whose is the set of positive integers and whose range is the set of positive even integers
D. Give an example of a function whose domain is the set of positive even integers and whoce range is the set of positive odd integers
Egive an example of function whose domain is the set of integers and whoce range is the set of positive integers.
F. Give an example of function whose domain is the set of positive integers and whoce range is the set of integers.
plese show me the work

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