- #1
economist1985
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Homework Statement
If f is a real function which is continuous at a element R and if f(a)<M for some M element of R, prove that there is an open interval I containing a such that f(x)<M for all x element of I.
Homework Equations
Extreme value theorem, intermediate value theorem, definition of continuity
The Attempt at a Solution
I have no idea how to solve this.