Discrete Mathematics

Question

How do I get the solution to...

Let A={-1,0,2,4,7}. Find f(A) if ?

a) f(x)=1

b) f(x)= 2x+1

c) f(x)=[x/5]

d) f(x)=[(x^2+1)/3]

Answer 1

f(A) is the set of all the outputs (images) of the given set A. Remember the domain is the set given by A. If all the images are distinct, you have a 1-1 function for that set.