普通高中课程标准实验教科书A版《数学必修①》(人民教育出版社,2007年第2版)(下简称《必修①》)第49-53页“2.1.1指数与指数幂的运算”写道:(1)正数的正分数指数幂的意义是a~(m/n)=a~m~n~(1/2)(a>0,m、n∈N~*,且n>1);(2)正数的负分数指数幂的意义与负整数指数幂的意义相仿,即a~(-n/-m)=a~(m/n)(a>0,m、n∈N~*,且n> Ordinary High School Curriculum Standard Experimental Textbook A version of “Mathematical compulsory ①” (People’s Education Press, 2007 second edition) (hereinafter referred to as “compulsory ①”) 49-53 "2.1.1 exponential and exponential power of computing Writes: (1) The positive exponential exponent power has the meaning a ~ (m / n) = a ~ m ~ n ~ (1/2) (a> 0, m, n∈N ~ * and n> 1); (2) The meaning of the negative exponential exponential power of positive numbers is similar to that of negative exponential exponential power, ie a ~ (-n / -m) = a ~ (m / n) , N∈N ~ *, and n>