计算:x²+x+1-(x³)/(x-1)
问题描述:
计算:x²+x+1-(x³)/(x-1)
答
x²+x+1-(x³)/(x-1)
=[(x-1)(x²+x+1)-x³]/(x-1)
=(x³-1-x³)/(x-1)
=-1/(x-1)