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求lim _(xarrow infty )dfrac ({x)^2-3x+2}({x)^2-1}-|||-__求
题目：lim _(xarrow infty )dfrac ({x)^2-1}(2{x)^2-x-1}=-|||-__题目：
求lim _(xarrow infty )dfrac ({x)^2-1}(2{x)^2-x-1}-|||-__;求;
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
)求下列极限:-|||-(1) lim _(xarrow 1)dfrac ({x)^2-x+1}({(x-1))^2} =-|||-(3) lim _(xarr
极限lim _(xarrow infty )(x)^2(2-xsin dfrac (1)(x)-cos dfrac (1)(x))=A.lim _(xarrow
lim _(xarrow infty )(2-dfrac (1)(x)+dfrac (1)({x)^2});;
9.求下列函数的极限-|||-(1) lim _(xarrow -1)dfrac ({x)^3-1}(x-1);-|||-(3) lim _(xarrow in
9.求下列函数的极限-|||-(1) lim _(xarrow -1)dfrac ({x)^3-1}(x-1) =-|||-(3) lim _(xarrow i
(2) lim _(xarrow 1)dfrac ({x)^2-2x+1}({x)^2-1};