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man111 · 28-12-2010, 08:57 PM

Find Max. value of $(a-x)(b-y)(c-z)(ax+by+cz) $. where $a,b,c $ are positive and $(a-x),(b-y) $ and $(c-z) $ are also positive.

28-12-2010, 08:57 PM	#1
man111 +Thành Viên+ Tham gia ngày: Nov 2010 Bài gởi: 280 Thanks: 152 Thanked 77 Times in 49 Posts	Maximum value. Find Max. value of $(a-x)(b-y)(c-z)(ax+by+cz) $. where $a,b,c $ are positive and $(a-x),(b-y) $ and $(c-z) $ are also positive.