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alphonsas
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Homework Statement
f: A -> B is a function with C a subset of B. Prove that
f(f^-1(C)) = [C intersection Im(f)]. (f^-1(c) = f inverse of C)
Homework Equations
The Attempt at a Solution
Please let me know how to approach to the solution (not using venn diagrams). Also if possible give me any link that gives tips on approaching any general sets and functions problem.
Thank you.
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