Services & ResourcesWolfram ForumsMathGroup Archive

[Date Index] [Thread Index] [Author Index]

Help: ratio of integral of f(x)^2 to square of integral of f(x)

• To: mathgroup at smc.vnet.net
• Subject: [mg67352] Help: ratio of integral of f(x)^2 to square of integral of f(x)
• From: ronnen.levinson at gmail.com
• Date: Mon, 19 Jun 2006 00:01:20 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hi.

I'm trying to determine whether the following ratio

r = (b-a) Integral[ f(x)^2 dx, {x, a, b} ] /
              Integral[ f(x) dx, {x, a, b} ]

is always greater than or equal to one for 0 < f(x) <= 1. All values
all real.

I've obtained r>=1 for all tested choices of f(x), but seek guidance to
find the general answer.

Yours truly,

Ronnen Levinson.

P.S. E-mailed CC:s of posted replies appreciated.

• Follow-Ups:
  • Re: Help: ratio of integral of f(x)^2 to square of integral of f(x)
    • From: "Carl K. Woll" <carlw@wolfram.com>