lim _(xarrow infty )dfrac (sqrt {{x)^2+5}-3}({x)^2}--|||-○

lim _(xarrow infty )dfrac (3{x)^2+5}(5x+3)sin dfrac (2)(x)= __

lim _(xarrow 2)dfrac (sqrt {{x)^2+5}-3}({x)^2-4}=-|||-○

lim _(xarrow infty )(x)^2(sqrt (dfrac {1+{x)^2}({x)^2}}-1)= __

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

lim _(xarrow infty )(3x-sqrt (a{x)^2-x+1})=dfrac (1)(6), 则 a=

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

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

lim _(xarrow +infty )(sqrt ({x)^2+2x}-x);;

) lim _(xarrow +infty )(sqrt ({x)^2+x}-sqrt ({x)^2-x});

) lim _(xarrow +infty )(sqrt ({x)^2+x}-sqrt ({x)^2-x});