初一数学题(关于整式乘法的)
求证 a分之b的n次方等于a的n次方分之b的n次方
(b/a)^n等于n个(b/a)相乘,等于n个b相乘/n个a相乘,等于a^n/b^n
(b/a)^n =(b/a)(b/a)(b/a)......(b/a) =(b*b*b*......*b)/(a*a*a*......*a) =(b^n)/(a^n).
(a/b)^n =(a/b)(a/b)(a/b)......(a/b) =(a*a*a*......*a)/(b*b*b*......*b) =(a^n)/(b^n).
还要人帮助做作业? 我小时候就没有
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