我
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以下结论正确的是（ ）.
- A.函数f(x)的导数不存在的点，一定不是f(x)的极值点
- B.若x0为函数f(x)的驻点，则x0必为?(x)的极值点
- C.若函数f(x)在点x0处有极值，且fˊ(x0)存在，则必有fˊ(x0)=0
- D.若函数f(x)在点x0处连续，则fˊ(x0)一定存在
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- A.xln x+C
- B.-xlnx+C
- C.<img src="//img1.yqda.net/question-name/31/a32cd8d9b2788c8cde436c37dcddd2.png" alt="" />
- D.<img src="//img1.yqda.net/question-name/6d/7852f5fbdd7841ffbc25abbe95b804.png" alt="" />
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- A.y=x+1
- B.y=x－1
- C.<img src="//img1.yqda.net/question-name/c8/219f19238c0150ef0fffcba5bf53d1.jpg" height="26" width="54" />
- D.<img src="//img1.yqda.net/question-name/41/a81c981a90623adf5776c198c52260.jpg" height="26" width="55" />
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- A.x3+3x－4
- B.x3+3x－3
- C.x3+3x－2
- D.x3+3x－1
- A.<img src="www.yqda.net/images/onErrorImg.jpg" old-source="//img1.shangxueba.com/files/20140606/20140606202615_7485.jpg" alt="" />
- B.<img src="//img1.yqda.net/question-name/0a/78fe430108d5bd94e24052c8766b90.jpg" alt="" />
- C.<img src="//img1.yqda.net/question-name/b0/b3ec6f485e35bd30f22387534c3c51.jpg" alt="" />
- D.<img src="//img1.yqda.net/question-name/25/aeaea2a4b4626061a461b8f1d30b23.jpg" alt="" />
- A.较高阶的无穷小量
- B.等价无穷小量
- C.同阶但不等价的无穷小量
- D.较低阶的无穷小量
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- A.0
- B.<img src="//img1.yqda.net/question-name/c4/a1fc015f5bb9caf5a2fd5e2443f2f1.png" alt="" />
- C.<img src="//img1.yqda.net/question-name/32/9485e1fa623e5f4705023979fa55fb.png" alt="" />
- D.<img src="//img1.yqda.net/question-name/44/1e24277171399df9fc9f867ba6bc2d.png" alt="" />
- A.2sinxxcosx
- B.2cosxxsinx
- C.-2sinx+xcosx
- D.-2cosx+xsinx
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- A.0
- B.e－1
- C.2(e－1)
- D.<img src="//img1.yqda.net/question-name/a1/38a8b460dd0cd7484bced78deb58ff.jpg" height="26" width="51" />
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- A.1/2
- B.1
- C.3/2
- D.2
