a>-1/2時(shí),la-1l
a=-1/2時(shí),la-1l=la+2l
a為實(shí)數(shù),試比較a-1絕對(duì)值與a+2絕對(duì)值的大小.
a為實(shí)數(shù),試比較a-1絕對(duì)值與a+2絕對(duì)值的大小.
數(shù)學(xué)人氣：995 ℃時(shí)間：2020-06-24 05:34:05
優(yōu)質(zhì)解答
a-1絕對(duì)值與a+2絕對(duì)值,就是數(shù)軸上a到-2和1的距離,畫圖可以清楚地得出結(jié)論
a>-1/2時(shí),la-1l
a=-1/2時(shí),la-1l=la+2l
a>-1/2時(shí),la-1l
a=-1/2時(shí),la-1l=la+2l
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