Question

Proof or give a counterexample for the following statement

Let f:[8,18]→ *. Then f(f-1(G))=G for any G⊆\Re

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Answer #1

→ IR is Statement FS i for 18, 18 a function, then A lt (G) 22 at GER is False As for example consider f: (8,118] IR by f(x)

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