求k = (x-3)/(x+1)=1- 4/(x+1) 的计算过程,
问题描述:
求k = (x-3)/(x+1)=1- 4/(x+1) 的计算过程,
答
k=(x-3)/(x+1)
=[(x+1)-4]/(x+1)
=(x+1)/(x+1)-4/(x+1)
=1-4/(x+1)
这过过程叫做分离常数.