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If x^2 + x + k > 0 for any real value of x, what is k?
Author:
johnmayhk
GeoGebra
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判斷球體
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
四邊形的特性
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过定点且与直线相切的圆
task 7
三圓相切
Activity 1
CIRCLE
Discover Topics
Intersection
Matrices
Geometric Distribution
Combinatorics
Planes