| lim |
| n→∞ |
| 1 |
| 1•4 |
| 1 |
| 4•7 |
| 1 |
| 7•10 |
| 1 |
| (3n−2)(3n+1) |
=
| lim |
| n→∞ |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 7 |
| 1 |
| 3n−2 |
| 1 |
| 3n+1 |
=
| lim |
| n→∞ |
| 1 |
| 3 |
| 1 |
| 3n+1 |
=
| lim |
| n→∞ |
| 1 |
| 3 |
| 3n |
| 3n+1 |
| 1 |
| 3 |
故答案为
| 1 |
| 3 |
limn→∞[1/1•4+1/4•7+1/7•10+…+1/(3n−2)(3n+1)]=_．
| lim |
| n→∞ |
| 1 |
| 1•4 |
| 1 |
| 4•7 |
| 1 |
| 7•10 |
| 1 |
| (3n−2)(3n+1) |
数学人气：402 ℃时间：2020-05-11 09:35:43
优质解答
=
=
=
故答案为
我来回答
类似推荐
猜你喜欢
- 1怎样去做,才能将数学的选择题、填空题的正确率提高?给些建议,
- 2bob was so tired that he ( ) (sleep) earlier than usual 谁知道
- 3建筑工地用的混凝土是用水泥、沙子、石子三种材料按1：2：4的质量比搅拌而成的． （1）搅拌这种混凝土14吨，需要水泥、沙子和石子各多少吨？ （2）现在工地有水泥7吨、沙子10吨、石子2
- 4读过一本好书,就像交了一个益友.
- 5同义句转换:Li Lei is the tallest boy in our class.
- 6相同质量物体全部浸没在水中和改变形状漂浮在水上浮力有什么区别
- 7谓语与表语
- 81+1等于14为什么,求,急啊
- 9People think they will be l____if they eat eggs on the birthday.
- 10我在第五十一中学上学用英语怎么说?