求 lim sin(x-1)/(x^2-1) 其中 x->1
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求limsin(x-1)/(x^2-1)其中x->1求limsin(x-1)/(x^2-1)其中x->1求limsin(x-1)/(x^2-1)其中x->1limsin(x-1)/(x^2-1)=li
求 lim sin(x-1)/(x^2-1) 其中 x->1
求 lim sin(x-1)/(x^2-1) 其中 x->1
求 lim sin(x-1)/(x^2-1) 其中 x->1
lim sin(x-1)/(x^2-1) =lim sin(x-1)/((x-1)(x+1))=lim sin(x-1)/(x-1)*lim1/(x+1)=1*1/2=1/2 其中 x->1
分子分母求导
LIM COS(X-1)/(2X) =1/2
=lim sin(x-1)/(x+1)(x-1) (x->1)
=lim sin 1/x+1
=sin1/2
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