按照如图所示的运算程序计算函数y的值,若输入x的值是5,则输出y的值是14,若输入x的值是
,则输出y的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/6756eb18-4924-46bf-a1e4-94dc942cbfc7.png?resizew=396)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/6756eb18-4924-46bf-a1e4-94dc942cbfc7.png?resizew=396)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23八年级下·河北石家庄·期中 查看更多[3]
河北省石家庄市外国语学校2022-2023学年八年级下学期期中数学试卷河北省秦皇岛市卢龙县2022-2023学年八年级下学期期末数学试题(已下线)第11讲 变量与函数(知识解读+题型精讲+随堂检测)-2023-2024学年八年级数学上册《知识解读·题型专练》(北师大版)
更新时间:2023-04-29 14:19:58
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名校
【推荐1】函数
与
的图象如图所示,下面结论:①
,②
,③
,④当
时,
,其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/ed3179e2-5d18-4811-ac7e-d50c43beb039.png?resizew=195)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b840ac495b22adab0bc8e210d6f1abe7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/ed3179e2-5d18-4811-ac7e-d50c43beb039.png?resizew=195)
A.②③④ |
B.③④ |
C.①②③④ |
D.① |
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【推荐2】对于实数a、b,定义一种运算“
”为:ab=
,有下列命题:①1
3=2;②方程x
1=0的根为:
,
;③不等式组
的解集为:
;④点(
,
)在函数y=x
(
)的图象上.其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71e92dfdf2883fa6578864b8291544f.png)
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A.①②③④ | B.①③ | C.①②③ | D.③④ |
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【推荐1】一次函数
的图象过点
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A.![]() | B.![]() | C.![]() | D.![]() |
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