怎么求y=(-3-x)/(x+2)的单调增区间.
问题描述:
怎么求y=(-3-x)/(x+2)的单调增区间.
答
y=(-(x+2)-1)/(x+2)=-1-1/(x+2)
所以,单调增区间是(-无穷,-2)和(-2,+无穷)