Find and prove the minimum possible value of (a²bc+b?cd+c?da+d²ab)(ab²c+bc²d+cd²a+da?b)(abc²+bcd²+cda²+dab?) over all positive integers a, b, c, d, a363 c³d3 or show there is no minimum.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Find and prove the minimum possible value of
(a?bc+b? cd+c²da+ď²ab)(ab²c+bc²d+cd?a+da?b)(abc²+bcd²+cda²+dab²)
over all positive integers a, b, c, d,
a36³ c³d³
or show there is no minimum.
Transcribed Image Text:Find and prove the minimum possible value of (a?bc+b? cd+c²da+ď²ab)(ab²c+bc²d+cd?a+da?b)(abc²+bcd²+cda²+dab²) over all positive integers a, b, c, d, a36³ c³d³ or show there is no minimum.
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