• 2022-06-16
    用极限的定义证明lim[x→∞](x^2)/(x^2+1)=1
  • 用定义证明极限实际上是格式的写法,依样画葫芦就是:  证对任意ε>0,要使    |(x^2)/(x^2+1)-1|=1/(x^2+1)<1/|x|<ε,只需|x|>1/ε,取X=1/ε,则当x>X时,有    |(x^2)/(x^2+1)-1|<1/|x...

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