[問題] 柴比雪夫不等式的證明
想請問有關不等式證明的其中一個步驟為什麼我的理解是錯的?(如下圖)
朋友只說了一句因為期望值沒有反函數的性質
還是有點霧煞煞
請前輩們解惑
謝謝
http://imgur.com/lsIxDgo
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