home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.math:17197 rec.puzzles:8058
- Newsgroups: sci.math,rec.puzzles
- Path: sparky!uunet!stanford.edu!Csli!hiraga
- From: hiraga@Csli.Stanford.EDU (Yuzuru Hiraga)
- Subject: Integral Puzzle (Cute, not Evil)
- Message-ID: <1992Dec19.011244.2780@Csli.Stanford.EDU>
- Organization: Stanford University CSLI
- Date: Sat, 19 Dec 1992 01:12:44 GMT
- Lines: 20
-
-
- Let f be any function such that:
- * for 0<=x<=1; 0<=f(x)<= a
-
- /1
- * | f(x)dx = A
- /0
- where a and A are given constants (obviously, A<=a).
-
- What are the maximum and minimum values that
-
- /1 2
- | {f(x)} dx
- /0
-
- can take?
- The values can be easily induced, but come up with
- a simple (cute) proof.
-
- -Yuzuru Hiraga
-