Let f : R → R be a continuous function and let S ⊆ R and T ⊆ R. How do I prove that:

If T is closed, then f−1(T) is closed.

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- April 24th 2011, 04:30 PMalice8675309prove that if T is closed then the inverse image is closed
Let f : R → R be a continuous function and let S ⊆ R and T ⊆ R. How do I prove that:

If T is closed, then f−1(T) is closed. - April 24th 2011, 04:40 PMPlato
What is the relationship between http://quicklatex.com/cache3/ql_27fc...9828f09_l3.png

- April 24th 2011, 04:48 PMHallsofIvy
To give a complete answer, one would have to know what

**definition**of "closed" you are using (there are several different, but equivalent, definitions).