左极限和右极限怎么算,请举个例子,谢谢
1个回答
展开全部
就这么算,如
lim(x→-7-0)(x+5)*[|x+7|/(x+7)]
= lim(x→-7-0)(x+5)*[(-1)(x+7)|/(x+7)]
= (-1)lim(x→-7-0)(x+5)
= (-1)(-7+5)
= 2,
lim(x→-7+0)(x+5)*[|x+7|/(x+7)]
= lim(x→-7-0)(x+5)*[(x+7)|/(x+7)]
= lim(x→-7-0)(x+5)
= (-7+5)
= -2.
lim(x→-7-0)(x+5)*[|x+7|/(x+7)]
= lim(x→-7-0)(x+5)*[(-1)(x+7)|/(x+7)]
= (-1)lim(x→-7-0)(x+5)
= (-1)(-7+5)
= 2,
lim(x→-7+0)(x+5)*[|x+7|/(x+7)]
= lim(x→-7-0)(x+5)*[(x+7)|/(x+7)]
= lim(x→-7-0)(x+5)
= (-7+5)
= -2.
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
