计算
计算
求lim _(xarrow +infty )((dfrac {2)(pi )arctan x)}^x-|||-__求
求下列极限：lim _(xarrow +infty )((dfrac {2)(pi )arctan x)}^x-|||-__求下列极限：
计算 lim _(xarrow infty )((1+dfrac {2)(x))}^3x
求lim _(xarrow infty )[ x-(x)^2ln (1+dfrac (1)(x))] -|||-__求
lim _(xarrow infty )((dfrac {x)(2+x))}^3x
) lim _(xarrow +infty )(sqrt ({x)^2+x}-sqrt ({x)^2-x});
) lim _(xarrow +infty )(sqrt ({x)^2+x}-sqrt ({x)^2-x});
求极限：lim _(xarrow infty )((sin dfrac {1)(x)+cos dfrac (1)(x))}^x-|||-__ __求极限：
(7) lim _(xarrow +infty )(sqrt ({x)^2+x}-sqrt ({x)^2-x}) ;
求lim _(xarrow infty )dfrac (sin dfrac {3)(x)}(sin dfrac {2)(x)}求