Discrete Math Function problem

  • Thread starter raross
  • Start date
  • #1
raross
12
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Hey if anyone could help me with this I would be sooo grateful. I am trying to grasp the idea of onto, one-to-one and bijection(both) functions.

A sample problem is: If f(x) = 2x . What is f(Z), all integers. What is f(N), all naturals. What is f(R), all real. These are 3 different problems, and I am trying to figure out if they are onto, and/or one-to-one or bijection(which means both).

Any help would be a BIG HELP! Thanks!
 

Answers and Replies

  • #2
raross
12
0
anyone?

anyone? Thanks
 
  • #3
raross
12
0
... =/
 
  • #4
Tony11235
255
0
What is it you don't understand about one-to-one and onto functions?
 
  • #5
philosophking
175
0
Yeah, definitions are always the most important thing here. Type them up here and think about them for a bit and then we'll see what you're having trouble with.
 

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