一在数学里,有些名称,在不同的场合,不同的阶段有不同的含意。譬如: “幂”这个名称,开始是指“相同因数的乘积”(正整数指数幂),后来,把1/a~n(n是正整数)也算作幂,记作a~(-n)(a≠0);把a~m~(1/n)(m,n正整数)也算作幂,记作a~(m/n)(a>0);甚至a°(a≠0)也算作幂……。 In mathematics, some names have different meanings on different occasions and different stages. For example: The name “power” starts with the “product of the same factor” (a positive integer exponent power). Later, 1/a~n (n is a positive integer) is also counted as a power, denoted by a~(-n). (a≠0); Count a~m~(1/n)(m,n positive integer) also as a power, denoted as a~(m/n)(a>0); even a°(a≠0) ) Also counted as a power ....