lim(x→+∞)x[3x-√(9 x²-6)]
2个回答
展开全部
lim x[3x-√(9x²-6)]
x→+∞
=lim x[3x-√(9x²-6)][3x+√(9x²-6)]/[3x+√(9x²-6)]
x→+∞
=lim x[9x²-(9x²-6)]/[3x+√(9x²-6)]
x→+∞
=lim 6x/[3x+√(9x²-6)]
x→+∞
=lim 6/[3+√(9 -6/x²)]
x→+∞
=6/[3+√(9-0)]
=6/(3+3)
=6/6
=1
x→+∞
=lim x[3x-√(9x²-6)][3x+√(9x²-6)]/[3x+√(9x²-6)]
x→+∞
=lim x[9x²-(9x²-6)]/[3x+√(9x²-6)]
x→+∞
=lim 6x/[3x+√(9x²-6)]
x→+∞
=lim 6/[3+√(9 -6/x²)]
x→+∞
=6/[3+√(9-0)]
=6/(3+3)
=6/6
=1
本回答被提问者采纳
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