I want to ask how to prove whether the following limit is corrent
limx→0[xexE1(x)]=0,
with
E1(x)=∫∞xe−ttdt. I try to run it by Matlab and it seems to be true.
How to find limh→0sin(ha)h without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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