一阶导数存在不能推导出二阶导数的存在，更不能由一阶导数的延拓推导出二阶导数的延拓。例如，函数f=x2 2x1x0；2x2；x> 0；这个分段函数的一阶导数是连续的，但是它的二阶导数不是连续的，有一个点是没有导数的。
I have a dialog box, created with the code javascript and HTML generated below. I\'d like remove the class \"ui-button-text-only\" for the buttons and for the container add \"style=font-size: 0.9em;\"
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I\'d like to have the ability to highlight a number and look it up in an 开发者_开发问答external browser based system.Is it possible to add a right-click action to Outlook and open a url using the hig
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Looking for a free spell checking solution, I thought I was so smart in doing this but I guess not. I have created a windows form based application and I want the form to add a user specified amount
I want to remove rectangles etc that enclose text in a screenshot image, so that I can perform optical character recognition to get accurate text from the screenshot.
I need to implement a statistics reporter - an object that prints to screen bunch of statistic. This info is updated by 20 threads.
We are developing an application which consists of: a source code base given to us by a partner infrequently. This is a somewhat working code, \"final\" version of something (and we get it i开发者_
If i apply a property to a parent widget it is automatically applied for child widgets too.. Is there any way of preventing this?? For example if i set background color as white in a dialog the button
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