(3.)求下列极限:-|||-(1) lim _(xarrow infty )dfrac (1)(1+{z)^2} ;-|||-(3) lim _(zarrow 1)dfrac (z-i)(z(1+{z)^2)} ;-|||-(2) lim _(xarrow 0)dfrac (Re(z))(z) ;-|||-(4) lim _(xarrow 1)dfrac (zoverline {z)+2z-overline (z)-2}({z)^2-1}

根据函数极限的定义证明:(1)lim _(xarrow infty )dfrac (1+{x)^3}(2{x)^3}=dfrac (1)(2) __;(2)li

3.求下列函数的极限.-|||-(1) lim _(xarrow infty )x((e)^dfrac (1{x)}-1);-|||-(2) lim _(xar

求极限 lim _(xarrow +infty )((x+sqrt {1+{x)^2})}^dfrac (1{x)}

一根据函数极限的定义证明:-|||-(1) lim _(xarrow infty )dfrac (1+{x)^3}(2{x)^3}=dfrac (1)(2);-

计算极限__-|||-lim _(xarrow 0)dfrac ({(1+{x)^2)}^dfrac (1{3)}-1}(xtan x)=计算极限

)求下列极限:-|||-(1) lim _(xarrow 1)dfrac ({x)^2-x+1}({(x-1))^2} =-|||-(3) lim _(xarr

令(x)=lim _(xarrow infty )dfrac (1-{e)^-ax}(1+{e)^-ax},则(x)=lim _(xarrow infty )d

lim _(xarrow +infty )((1+{e)^x)}^dfrac (1{x)};

求极限lim _(xarrow 0)((dfrac {sin x)(x))}^dfrac (1{ln (1+{x)^2)}}求极限

lim _(xarrow 0)dfrac ({(1+{x)^2)}^dfrac (1{3)}-1}(sin {x)^2}=-|||-______________