- #1
- 105
- 15
The problem reads: ##f:M \rightarrow N##, and ##L \subseteq M## and ##P \subseteq N##. Then prove that ##L \subseteq f^{-1}(f(L))## and ##f(f^{-1}(P)) \subseteq P##.
My co-students and I can't find a way to prove this. I hope, someone here will be able to help us out. It would be very appreciated.
Thank you in advance and have a great day everyone.
My co-students and I can't find a way to prove this. I hope, someone here will be able to help us out. It would be very appreciated.
Thank you in advance and have a great day everyone.