“plus or minus”的概念、定义、习题解题方法及翻译-数学辞典

单词

plus or minus

释义

plus or minus

The symbol ± is read as ‘plus or minus' and denotes the two possibilities of + and−as in the the quadratic formula, when either the positive or negative square root of the discriminant is valid. It can be efficiently used alongside the ∓ symbol, read ‘minus or plus', as in the identity

to signify that the + (respectively − ) in ± corresponds to the − (respectively + ) in ∓.

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数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。