- A.1
- B.<img src="//img1.yqda.net/question-name/08/c12a582c7d99eb9a4362d890425e49.jpg" alt="" border="0" />
- C.0
- D.<img src="//img1.yqda.net/question-name/63/b9b3ddd11d07bda9fa101f689ae1cf.jpg" alt="" border="0" /> &nbs
- A.<img src="//img1.yqda.net/question-name/ec/b6448158ded39178c930f0988cfedd.jpg" alt="" border="0" />
- B.1
- C.2
- D.+∞  
- A.1
- B.2
- C.3
- D.4
- 23
-
设y=e-3x,则dy=
- A.e<sup>-3x</sup>dx
- B.-e<sup>-3x</sup>dx
- C.-3e<sup>-3x</sup>dx
- D.3e<sup>-3x</sup>dx
- A.c1+c2e-x
- B.e-x(c1+C2x)
- C.c1e-x
- D.c1e-x+c2ex
- A.6xarctanx2
- B.6xtanx2+5
- C.5
- D.6xcos2x
- A.仅有水平渐近线
- B.既有水平渐近线,又有铅直渐近线
- C.仅有铅直渐近线
- D.既无水平渐近线,又无铅直渐近线
- 28
-
设y=x2-e2,则y=
- A.2x-2e
- B.2x-e2
- C.2x-e
- D.2x