单词	i (unit imaginary number)
释义	i (unit imaginary number) The square root of minus 1 The symbol is i It is a number that, when multiplied by itself, produces −1 But when we square any Real Number we always get a positive, or zero, result. For example: • 2 × 2 = 4, and • (−2) × (−2) = 4 also. So how can we square a number and get a negative result? Just "imagine" that we can, and it turns out that such a number, which may seem impossible, is actually useful and can solve real problems. See: Real Number
随便看	oblique cone oblique cylinder oblique prism oblique pyramid oblong obtuse angle obtuse triangle octagon octahedron octal odd number odds odometer one dimensional opaque open curve open interval open sentence operation operator opportunity cost opposite numbers opposite side or order of magnitude

数学辞典收录了1200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。