这个软件可以用来绘制函数图像 并可以求一个函数的最值，截距与几个函数的焦点等，就像电脑上的几何画板一样。是个很实用的数学软件，3版的机子也能用。
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on 星期二, 十二月 15th, 2009 and is filed under 实用工具.
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