(7)已知极限 lim _(xarrow +infty )(dfrac ({x)^2}(x+1)-x-a)=2, 则常数a是 () 。(2017会计选择2 )-
已知极限 lim _(x arrow infty)((x^2)/(x+1)-x-a)=2,则常数 a 是( )A. 1B. 2C. -2D. -3
极限 lim _(xarrow infty )((dfrac {x+1)(x-1))}^x= () .
极限 lim _(xarrow infty )((dfrac {x+1)(x-1))}^x= __
(3) lim _(xarrow infty )((dfrac {2x+3)(2x+1))}^x+1
(3) lim _(xarrow infty )((dfrac {2x+3)(2x+1))}^x+1;
(3) lim _(xarrow infty )((dfrac {2x+3)(2x+1))}^x+1;
(2) lim _(xarrow infty )((dfrac {2x+3)(2x+1))}^x+1;
已知 lim _(xarrow infty )((dfrac {x+2a)(x-a))}^x=8 ,求 a.
(5) lim _(xarrow infty )((dfrac {2x+3)(2x+1))}^x+1;