1 . 如图,在平面直角坐标系中,正方形OA1B1C1,B1A2B2C2,B2A3B3C3,···的顶点B1,B2,B3,···在x轴上,顶点C1,C2,C3···在直线y=kx+b上,若正方形OA1B1C1,B1A2B2C2的对角线OB1=2,B1B2=3, 则点C5的纵坐标是_____ .
![](https://img.xkw.com/dksih/QBM/2019/9/26/2299056880705536/2299189238972416/STEM/8df9ad05-aece-49c0-a1ad-4a48c1ad915c.png?resizew=347)
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2 . 如图,在平面直角坐标系中,点A1,A2,A3,…和B1,B2,B3,…分别在直线
和x轴上,△OA1B1,△B1A2B2,△B2A3B3,…都是等腰直角三角形.如果点A1(1,1),那么点A2019的纵坐标是( )
![](https://img.xkw.com/dksih/QBM/2019/6/25/2233069836279808/2234097582227456/STEM/fd85337ce732432b8003a7fe796c4f57.png?resizew=228)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5abacdda4961d3f8b9287f2ce7489bc.png)
![](https://img.xkw.com/dksih/QBM/2019/6/25/2233069836279808/2234097582227456/STEM/fd85337ce732432b8003a7fe796c4f57.png?resizew=228)
A.(![]() | B.(![]() | C.(![]() | D.(![]() |
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2019-04-19更新
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3卷引用:【区级联考】湖北省鄂州市梁子湖区2019届九年级下学期期中质量监测数学试题1