- 8
-
18.
- 19
-
下列结论正确的有
- A.若xo是f(x)的极值点,则x0一定是f(x)的驻点
- B.若xo是f(x)的极值点,且f’(x0)存在,则f’(x)=0
- C.若xo是f(x)的驻点,则x0一定是f(xo)的极值点
- D.若f(xo),f(x2)分别是f(x)在(a,b)内的极小值与极大值,则必有 f(x1)<f(x2)  
- A.O
- B.<img src="//img1.yqda.net/question-name/ab/42a44e2b5c6fe5101b612d12f7c6af.jpg" alt="" border="0" />
- C.1
- D.3
- A.充分必要条件
- B.充分非必要条件
- C.必要非充分条件
- D.既非充分也非必要条件
- 22
-
下列级数绝对收敛的是
- A.<img src="//img1.yqda.net/question-name/e4/c4c0f59fb32b2c8c27001d38f5451d.jpg" alt="" border="0" />
- B.<img src="//img1.yqda.net/question-name/4a/a48435137b5b24888b36cd5b62cf26.jpg" alt="" border="0" />
- C.<img src="//img1.yqda.net/question-name/dd/67b786e3b83bbc5f9b6106c6cc7989.jpg" alt="" border="0" />
- D.<img src="//img1.yqda.net/question-name/70/97af5347872c18e231c9e66ce51c6f.jpg" alt="" border="0" /> &nbs
- A.<img src="//img1.yqda.net/question-name/66/a939aeb50f369f885ef369cd7fa058.jpg" alt="" border="0" />
- B.<img src="//img1.yqda.net/question-name/9f/c3d1fa875c2854dd3b289dafa5724f.jpg" alt="" border="0" />
- C.<img src="//img1.yqda.net/question-name/3c/b84160a67749a3b4f307172921265f.jpg" alt="" border="0" />
- D.<img src="//img1.yqda.net/question-name/19/71d4edb364662fba4a6e7818dd84d5.jpg" alt="" border="0" /> &nbs
- A.-2
- B.-1
- C.1
- D.2
- A.(-5,5)
- B.(-∞,0)
- C.(0,+∞)
- D.(-∞,+∞)
- 26
-
下列极限( )不正确.
- A.<img src="//img1.yqda.net/question-name/ae/75de8c0ca40568b8e926501f46c03e.jpg" alt="" border="0" />
- B.<img src="//img1.yqda.net/question-name/90/4cc211e2e4e763449fbb8e0f4ba6ac.jpg" alt="" border="0" />
- C.<img src="//img1.yqda.net/question-name/62/872734e2e8aa9285d786b7bf99a056.jpg" alt="" border="0" />
- D.<img src="//img1.yqda.net/question-name/db/c9a29f4b91264ae42538851624c6af.jpg" alt="" border="0" /> &nbs
- A.为y的极大值点
- B.为y韵极小值点
- C.不为y的极值点
- D.是否为y的极值点与a有关