计算(分式的简便运算)(1/a^2-1/b^2)(1/a^2-1/ab+1/b^2)(1/a^2+1/ab+1/b^2)
问题描述:
计算(分式的简便运算)(1/a^2-1/b^2)(1/a^2-1/ab+1/b^2)(1/a^2+1/ab+1/b^2)
答
=(1/a+1/b)(1/a-1/b)(1/a²-1/ab+1/b²)(1/a²+1/ab+1/b²)
=(1/a+1/b)(1/a²-1/ab+1/b²)(1/a-1/b) (1/a²+1/ab+1/b²)
=(1/a³+1/b³)(1/a³-1/b³)
=1/a的6次方-1/b的6次方