作业帮求怎样解极限lim(x→1)[(3/1-x三次方)-(1/1-x)]
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/25 12:57:53
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求怎样解极限lim(x→1)[(3/1-x三次方)-(1/1-x)]
求怎样解极限lim(x→1)[(3/1-x三次方)-(1/1-x)]
求怎样解极限lim(x→1)[(3/1-x三次方)-(1/1-x)]
答案是1
但你的表达太不规范了
首先1-x*x*x=(1-x)(1+x+x*x)
所以两边同分,相减 ,分子为2-x-x*x=-(x*x+x-2)=-(x-1)(x+2)
约分之后为（x+2 )/(1+x+x*x)
当x=1时 ,原试=1
求怎样解极限lim(x→1)[(3/1-x三次方)-(1/1-x)]
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