公元3世纪,我国古代数学家刘徽就能利用近似公式
≈a+
得到
的近似值.他的算法是先将
看成
,由近似公式得到
≈1+
=
;再将
看成
,由近似公式得到
≈
+
=
;…依此算法,所得
的近似值会越来越精确.当
取得近似值
时,近似公式中的a是________ ,r是________ .
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17-18九年级·辽宁鞍山·期末 查看更多[8]
辽宁省鞍山二中2018届九年级(上)期末模拟数学试卷(已下线)2年中考1年模拟 第一篇 数与式 专题05 二次根式2018春冀教版七年级数学下册练习: 期末达标检测卷【全国校级联考】福建省厦门市六校2017-2018学年下学期八年级期中联考数学试卷人教版七年级下册数学练习:检测卷期末达标检测卷山东省曲阜市2018-2019学年八年级下学期期中考试数学试题福建省厦门第六中学2018-2019学年八年级下学期3月数学试题(已下线)期末难点特训(三)和二次根式的计算有关的难题-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(苏科版)
更新时间:2018-01-23 13:19:38
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【推荐1】如图,已知
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