共50条信息
如图,在平面直角坐标系\(xOy\)中,\(\triangle OA_{1}B_{1}\)绕点\(O\)逆时针旋转\(90^{\circ}\),得\(\triangle OA_{2}B_{2}\);\(\triangle OA_{2}B_{2}\)绕点\(O\)逆时针旋转\(90^{\circ}\),得\(\triangle OA_{3}B_{3}\);\(\triangle OA_{3}B_{3}\)绕点\(O\)逆时针旋转\(90^{\circ}\),得\(\triangle OA_{4}B_{4}\);\(…\);若点\(A_{1}(1,0)\),\(B_{1}(1,1)\),则点\(B_{4}\)的坐标是_______,点\(B_{2018}\)的坐标是_______.
用火柴棍按如图所示的方式摆大小不同的“\(E\)”,依此规律,摆出第\(n\)个“\(E\)”需要火柴棍的根数是( )
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