Question

lim

n→+∞

(

n2+n

-n)=______．

Answer 1

lim

n→∞

(

n2+n

-n)=

lim

n→∞

( n+n2 +n)( n2+n -n)

n2+n +n

=

lim

n→∞

n

n2+n +n

=

lim

n→∞

1

1+ 1+ 1 n

=

1

2

故答案为：

1

2