5/(x^-2 +6)怎么化,要化成分数形式
问题描述:
5/(x^-2 +6)怎么化,要化成分数形式
答
5/(x^-2 +6)
=5/(1/x^2 +6)
=5/[(1+6x^2)/x^2]
=(5x^2)/(1+6x^2)