【x²-1分之3x-3】÷【x+1分之3x】-【x-1分之1】,其中x=2
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![【x²-1分之3x-3】÷【x+1分之3x】-【x-1分之1】,其中x=2](/uploads/image/z/578344-40-4.jpg?t=%E3%80%90x%26%23178%3B-1%E5%88%86%E4%B9%8B3x-3%E3%80%91%C3%B7%E3%80%90x%2B1%E5%88%86%E4%B9%8B3x%E3%80%91-%E3%80%90x-1%E5%88%86%E4%B9%8B1%E3%80%91%2C%E5%85%B6%E4%B8%ADx%3D2)
【x²-1分之3x-3】÷【x+1分之3x】-【x-1分之1】,其中x=2
【x²-1分之3x-3】÷【x+1分之3x】-【x-1分之1】,其中x=2
【x²-1分之3x-3】÷【x+1分之3x】-【x-1分之1】,其中x=2
【x²-1分之3x-3】÷【x+1分之3x】-【x-1分之1】
=[3(x-1)/(x+1)(x-1)]÷[3x/(x+1)]-[1/(x-1)]
=[3(x-1)/(x+1)(x-1)]*[(x+1)/3x]-[1/(x-1)]
=(1/x)-[1/(x-1)]
=(1/2)-[1/(2-1)]
=(1/2)-1
=-0.5