lim(x→0)[(1/x)-(1/ln1+x)]
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lim(x→0)[(1/x)-(1/ln1+x)]
lim(x→0)[(1/x)-(1/ln1+x)]
lim(x→0)[(1/x)-(1/ln1+x)]
lim【x→0】[1/x-1/ln(1+x)]
=lim【x→0】[ln(1+x)-x]/[xln(1+x)]
=lim【x→0】[1/(1+x)-1]/[ln(1+x)+x/(1+x)]
=lim【x→0】(-x)/[(1+x)ln(1+x)+x]
=lim【x→0】-1/[ln(1+x)+1+1]
=-1/2
答案:-1/2
lim(x→0)[(1/x)-(1/ln1+x)]
=lim(x→0){[-x+ln(1+x)]/xln(1+x)}
属于0/0型,运用洛必达法则,=lim(x→0)x/[(x+1)x+ln(1+x)]
属于0/0型,运用洛必达法则=lim(x→0)【1/(3x+2)】=1/2
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