证明lim（x->1）x^2/(x+1) =1/2lim (x→1)x^2/(x+1)= lim (x→1)[（x^2-1）/(x_其他解答

证明lim（x->1）x^2/(x+1) =1/2
lim (x→1)x^2/(x+1)= lim (x→1)[（x^2-1）/(x+1)+1/(x+1)] = lim (x→1)[x-1+1/(x+1)]=1/2这样做对吗

人气：246 ℃　时间：2020-03-19 08:54:26

解答

没必要这样做
直接代入即可
lim（x→1）x^2/(x+1)=1^2/(1+1)=1/2
如果不懂,祝学习愉快!证明lim(x→0) √x sin(1/x) =0这题呢