若分式x²/(x²+x)化简为x/(1+x),则x满足的条件是_____________
问题描述:
若分式x²/(x²+x)化简为x/(1+x),则x满足的条件是_____________
A x≠-1或x≠0 B x≠-1 C x≠-1且x≠0 D X≠0
答
x^2/(x^2+x)
=x^2/[x(1+x)]
=x/(1+x)
只要分母有意义,就可以.
x(1+x) ≠0
x≠-1且x≠0
选C