因?yàn)閍>0,所以|a|=a
因?yàn)閎0,那么|a+b|=a+b
如果a+b是有數(shù)軸|b|>|a|那么a+b是負(fù)數(shù)所以原式=3a-b
|a|-|b|-|a+b|+|b-a|=____ 化簡(jiǎn) b=負(fù)數(shù) a=正數(shù)
|a|-|b|-|a+b|+|b-a|=____ 化簡(jiǎn) b=負(fù)數(shù) a=正數(shù)
a=正數(shù) b=負(fù)數(shù) a>b
a=正數(shù) b=負(fù)數(shù) a>b
數(shù)學(xué)人氣:614 ℃時(shí)間:2020-08-30 11:10:16
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