lim(x→1) sin(1-x)/(1-x^2)
=lim(x→1) sin(1-x)/(1+x)(1-x)
=lim(x→1) [sin(1-x)/(1-x)]*lim(x->1)1/(1+x)
=1*1/2
=1/2=lim(x→1) [sin(1-x)/(1-x)]*lim(x->1)1/(1+x)不太明白我这样弄的意思是好让你更理解,结果你还不理解。就是你尽可能的转化为lim(x->0)sinx/x的形式。
求极限lim(x→1) sin(1-x)/(1-x^2)
求极限lim(x→1) sin(1-x)/(1-x^2)
数学人气:423 ℃时间:2020-03-15 18:45:57
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