Suppose F:X Y is onto. Prove that for all subsets B Y, F(F1(B)) = B
Chapter 7, Problem 41(choose chapter or problem)
Suppose \(F: X \rightarrow Y\) is onto. Prove that for all subsets \(B \subseteq Y, \quad F\left(F^{-1}(B)\right)=B\).
Text Transcription:
F: X rightarrow Y
B subseteq Y, quad F(F^-1 (B))=B
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