计算下列函数的极限。-|||-lim _(xarrow 1)dfrac ({x)^2-3x+2}({x)^2-1}

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

计算下列极限:-|||-lim _(xarrow 1)(dfrac (2)({x)^2-1}-dfrac (1)(x-1)).

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

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

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

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

计算函数极限(1)lim _(xarrow 1)dfrac (x-3)(x+2)(2)lim _(xarrow 1)dfrac (x-3)(x+2)(3)lim

1.求下列函数的极限.-|||-(1) lim _(xarrow 2)dfrac ({x)^2-4}({x)^2-3x+2} ;

计算极限lim _(xarrow 0)dfrac ({x)^2+3x}(2{x)^2-1}.计算极限.

计算下列极限：(1) lim _(xarrow 0)(x)^2sin dfrac (1)(x);-|||-(2) lim _(xarrow infty )dfr