![](https:///quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img./dksih/QBM/editorImg/2023/10/1/b2c65a13-13ca-4c2e-87d0-43ac353ec0a7.png?resizew=379)
为了预测该地区2018年的环境基础设施投资额,建立了
![](https:///quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https:///quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https:///quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https:///quesimg/Upload/formula/889d1b3ec41bb38d8ba5caab35922da4.png)
![](https:///quesimg/Upload/formula/4f43359d8c08518ad14d10b9196e219c.png)
![](https:///quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https:///quesimg/Upload/formula/d3f11671cf893c6d4e10c05be34ea298.png)
![](https:///quesimg/Upload/formula/32d7ba6145a181e60aea8b2cbe6d7bed.png)
(1)分别利用这两个模型,求该地区2018年的环境基础设施投资额的预测值;
(2)你认为用哪个模型得到的预测值更可靠?并说明理由.
![](http://static.xuejinqu.com/images/y-prise.png)
同类型试题
![](http://static.xuejinqu.com/images/medal.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)