海量資源,盡在掌握
 式子叫做根式,這里n叫做根指數(shù),a叫做被開方數(shù).當(dāng)n為奇數(shù)時,=a,當(dāng)n為偶數(shù)時,=|a|. (本文共 46 字 ) [閱讀本文] >>