1.求下列极限.-|||-(1) lim _(xarrow -2)(3(x)^2-5x+2) --|||-(4) lim _(xarrow 1)dfrac ({x)^2-1}(2{x)^2-x-1}-|||-(7) lim _(xarrow infty )dfrac ({(2x-1))^30((3x-2))^20}({(2x+1))^50}-|||-(10) lim _(xarrow 0)dfrac (sin 2x)(sin 3x)-|||-(2) lim _(xarrow sqrt {3)}dfrac ({x)^2-3}({x)^4+(x)^2+1}-|||-(5) lim _(harrow 0)dfrac ({(x+h))^3-(x)^3}(h)-|||-(8) lim _(xarrow 0)dfrac ({x)^2}(1-sqrt {1+{x)^2}} --|||-(11) lim _(xarrow 0)((dfrac {2-x)(2))}^dfrac (2{x)}-|||-(3) lim _(xarrow 2)dfrac ({x)^2-3}(x-2) .-|||-(6) lim _(xarrow infty )dfrac (2x+3)(6x-1)-|||-(9) lim _(xarrow 0)dfrac (tan x-sin x)(x)-|||-(12) lim _(xarrow infty )((dfrac {x-1)(x+1))}^x

求lim _(xarrow infty )dfrac ({x)^2-1}(2{x)^2-x-1}-|||-__;求;

题目：lim _(xarrow infty )dfrac ({x)^2-1}(2{x)^2-x-1}=-|||-__题目：

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

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

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

2.求下列极限：4) lim _(xarrow 1)(dfrac (1)(x-1)-dfrac (2)({x)^2-1});2.求下列极限：

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 -1)dfrac ({x)^2+2x+1}(x-1) ;-|||-(3) lim _(xarrow

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

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