]]>http://www.mathisfunforum.com/profile.php?id=1187862012-09-24T12:52:05Zhttp://www.mathisfunforum.com/viewtopic.php?pid=232927#p232927=4]]>If a, b, c, d are 4 positive numbers, show that a/b+b/c+c/d+d/a>=4]]>http://www.mathisfunforum.com/profile.php?id=1865672012-09-24T09:59:31Zhttp://www.mathisfunforum.com/viewtopic.php?pid=232916#p232916