题目内容
求下列函数的极限.(1)![]()
;(2)![]()
;
(3)![]()
;(4)![]()
.
解:(1)![]()
=![]()
(分子、分母同除以x4)
=
=
=0;
(2)![]()
=![]()
![]()
=![]()
=
=
=7;
(3)![]()
![]()
=![]()
![]()
=![]()
![]()
=![]()
![]()
=![]()
=
;
(4)![]()
![]()
=![]()
![]()
=
=
=0.
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题目内容
求下列函数的极限.(1)![]()
;(2)![]()
;
(3)![]()
;(4)![]()
.
解:(1)![]()
=![]()
(分子、分母同除以x4)
=
=
=0;
(2)![]()
=![]()
![]()
=![]()
=
=
=7;
(3)![]()
![]()
=![]()
![]()
=![]()
![]()
=![]()
![]()
=![]()
=
;
(4)![]()
![]()
=![]()
![]()
=
=
=0.