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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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柱體建築師
三位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
第八周作业
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時鐘問題
直線排列 3
骨牌
第14題
Orthographic Views 1
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Subtraction
Constructions
Geometric Distribution
Sine
Statistical Characteristics