常用對(duì)數(shù)首數(shù)的求法
高中數(shù)理化生公式定理

        若常用對(duì)數(shù)的真數(shù)大于1,則對(duì)數(shù)的首數(shù)為正數(shù)和零,其值比整數(shù)位數(shù)少1;若常用對(duì)數(shù)真數(shù)小于1,則對(duì)數(shù)的首數(shù)為負(fù)數(shù),其絕對(duì)值等于真數(shù)有效數(shù)字前面“0”的個(gè)數(shù)(包括小數(shù)點(diǎn)前的那個(gè)“0”).    （本文共 90 字 ）     [閱讀本文] >>