- #1
H2Pendragon
- 17
- 0
Man I've become desperate. I just signed up needing help on this homework. Can anyone help me with these two problems?
Let A be the set {1,2,3,4}. Prove that a relation R on A with 15 ordered pairs is not transitive.
I've got no clue on that one.
And this second one, which I know the proof, but I need some help wording it correctly:
If f is injective (one-to-one) and C subset D are any subsets of A, then f(D-C) = f(D) - f(C).
I know the proof, but every time I try and word it, it just sounds wrong.
Let A be the set {1,2,3,4}. Prove that a relation R on A with 15 ordered pairs is not transitive.
I've got no clue on that one.
And this second one, which I know the proof, but I need some help wording it correctly:
If f is injective (one-to-one) and C subset D are any subsets of A, then f(D-C) = f(D) - f(C).
I know the proof, but every time I try and word it, it just sounds wrong.