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首先根據|y|=1/x可知,1/x>;0,所以定義域為(0,∞).所以應先畫一個y=1/x,x∈(0,∞)的影像,如圖1.因為y有絕對值,故還應新增-y=1/x,x∈(0,∞)的影像,所以在將圖1影像根據X軸對稱,畫出圖2.
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