15.计算下列极限:-|||-(1) lim _(xarrow 0)sqrt ({x)^2-4x+2} ;-|||-(3) lim _(xarrow 0)dfrac (sqrt {4-x)-2}(x) ;-|||-(5) lim _(xarrow infty )(e)^dfrac (1{x)} ;-|||-(7) lim _(xarrow dfrac {pi )(6)}dfrac (sin x-cos x)(cos 2x)-|||-(9) lim _(xarrow 0)((1+3{tan )^2x)}^(cot ^2x) ;-|||-(2) lim _(xarrow -2)dfrac (2{x)^2+1}(x+1) ;-|||-(4) lim _(tarrow 3)ln ((t)^2-1) ;-|||-(6) lim _(xarrow 0)dfrac (sqrt {4+x)-2}(sin 2x) ;-|||-(8) lim _(harrow 0)dfrac (sqrt {x+h)-sqrt (x)}(h)-|||-(10) lim _(xarrow 0)dfrac ({e)^x-1}(x)

3.求下列极限:-|||-(1) lim _(xarrow 0)sqrt ({x)^2-2x+5} ;-|||-(4 lim _(xarrow 0)dfrac

1 计算下列极限1) lim _(xarrow 0)dfrac (sqrt {1+xsin x)-sqrt (cos x)}(xtan x);1) lim _(

8.计算下列极限：(1) lim _(xarrow 0)dfrac (sin 4x)(sqrt {x+1)-1}(1) lim _(xarrow 0)dfrac

1.计算下列极限:-|||-(1) lim _(xarrow 2)dfrac ({x)^2+5}(x-3) ;-|||-(4) lim _(xarrow 0)d

7.极限 lim _(xarrow 4)dfrac (sqrt {2x+1)-3}(sqrt {x)-2}= ()-|||-

求下列极限lim _(xarrow 4)dfrac (sqrt {2x+1)-3}(sqrt {x-2)-sqrt (2)}求下列极限

计算下列极限lim _(xarrow 1)dfrac (sqrt [3]{x)-1}(sqrt {x)-1}=______计算下列极限______

lim _(xarrow 4)dfrac (sqrt {2x+1)-3}(sqrt {x-2)-sqrt (2)}=..

计算下列极限lim _(xarrow 0)(x)^2sin dfrac (1)(x)lim _(xarrow 0)(x)^2sin dfrac (1)(x)计算

.求下列极限:-|||-(6) lim _(xarrow 4)dfrac (sqrt {2x+1)-3}(sqrt {x-2)-sqrt (2)} ;