- 4
-
求定积分
- 6
-
设
- 7
-
计算不定积分
- 8
-
设
- 9
-
求极限
- 10
-
设
- A.|A<sup>2</sup>|=|A|<sup>2</sup>
- B.A<sup>2</sup>-B<sup>2</sup>=(A-B)(A+B)
- C.(A-B)A=A<sup>2</sup>-AB
- D.(AB)<sup>T</sup>=A<sup>T</sup>B<sup>T</sup>
- 21
-
定积分
等于
- A.0
- B.3
- C.2
- D.1
- A.3
- B.-47
- C.17
- D.-l
- 23
-
下列各式正确的是
- A.∫2<sup>x</sup>dx=2<sup>x</sup>ln2+c
- B.∫sintdt=-cost+c
- C.<img src="//img1.yqda.net/question-name/69/69e00427f330dec6c2d53dfd4034c0.png" width="47" height="45"/>=arctanx
- D.<img src="//img1.yqda.net/question-name/2c/f0e725628dda59e265eb2e7342e5c3.png" width="126" height="46"/>
- A.<img src="//img1.yqda.net/question-name/e1/48cecb2bb14d113716a54d9a5e7f53.png" width="16" height="48"/>f'(a)
- B.<img src="//img1.yqda.net/question-name/43/91e27ecf6d4d29fc751a49a88a5647.png" width="29" height="48"/>f'(a)
- C.<img src="//img1.yqda.net/question-name/53/51cbfdd8576f2cbca20c724c026ed6.png" width="25" height="44"/>f'(a)
- D.<img src="//img1.yqda.net/question-name/88/98574d80fb8a0c3d4ab524d1952796.png" width="13" height="41"/>f'(a)
- A.8
- B.12
- C.-6
- D.6
- A.<img src="//img1.yqda.net/question-name/b7/dc690965c1d6a2d7d9c1675432a042.png" width="183" height="45"/>
- B.<img src="//img1.yqda.net/question-name/49/638e1a095badafc610e72c51f80fa3.png" width="174" height="48"/>
- C.1-2<sup>-x</sup>(x→0)
- D.<img src="//img1.yqda.net/question-name/7d/90386297308c5fdfe3a5aaaf77efee.png" width="173" height="53"/>
- 27
-
极限
等于
- A.<img src="//img1.yqda.net/question-name/94/2da4168a01f1b0de903e2a56b553a3.png" width="31" height="26"/>
- B.∞
- C.0
- D.<img src="//img1.yqda.net/question-name/5c/68b0fb56cde3f65e812f71483eb53f.png" width="22" height="58"/>
- A.平行于xoy面的平面
- B.平行于z轴的平面
- C.经过z轴的平面
- D.直线
- A.(-l,-2,3)
- B.(-1,-2,-3)
- C.(-l,2,一3)
- D.(1,-2,-3).
- A.<img src="//img1.yqda.net/question-name/d5/0daa325bb62dda1d4f58a4cacdba10.png" width="41" height="35"/>
- B.<img src="//img1.yqda.net/question-name/24/d6415364090ec7713ddfd634ce76c6.png" width="51" height="30"/>
- C.<img src="//img1.yqda.net/question-name/9d/29c019eb90f0be2c8ecc800d457998.png" width="39" height="32"/>
- D.<img src="//img1.yqda.net/question-name/36/e443feee6fadb22a17dad8028b2000.png" width="60" height="29"/>