我
有解，并求其解.- 5
-
求定积分
.
.- 6
-
求不定积分
.
.- 8
-
已知矩阵a=
.
.- 9
-
，求其微分dy。- 11
-
若
=________.
=________.- 12
-
的秩等于________.
=________.
处连续，则应补充定义f(0)= _______.
，则向量
夹角的余弦等于________.- 19
-
- A.0
- B.-l
- C.2
- D.1
- A.-2
- B.-1/2
- C.1/2
- D.2
- 21
-
不定积分I=
等于
等于- A.<img src="//img1.yqda.net/question-name/54/20f419a1daa637f1046e508c29e735.png" width="61" height="36"/>
- B.<img src="//img1.yqda.net/question-name/95/042059b3ebeed9a94a339827155dc2.png" width="90" height="46"/>
- C.<img src="//img1.yqda.net/question-name/39/cde073b56803bfe53b67a95161e0ac.png" width="66" height="46"/>
- D.<img src="//img1.yqda.net/question-name/49/afd5f849487d70d269635f1adb4cc7.png" width="72" height="42"/>
- 22
-
- A.2lnx
- B.ln<sup>2</sup>t
- C.ln<sup>2</sup>x
- D.-ln<sup>2</sup>x
- A.1n(1nx)
- B.lnx
- C.1/lnx<sup>2</sup>
- D.ln (2-x)
- A.高阶无穷小
- B.等价无穷小
- C.低阶无穷小
- D.同阶无穷小
- 25
-
若
，则dy等于
，则dy等于- A.<img src="//img1.yqda.net/question-name/cd/7f76f1c5a83e81f689bfd9b9cb76e3.png" width="75" height="41"/>
- B.<img src="//img1.yqda.net/question-name/5b/25a1726a9f47f7e1df64d9556130bf.png" width="60" height="42"/>
- C.<img src="//img1.yqda.net/question-name/79/5ac109ee6f96cad25ca8659499fef2.png" width="85" height="44"/>
- D.<img src="//img1.yqda.net/question-name/29/938d207571206f42a3606b852a0b80.png" width="73" height="49"/>
- 26
-
函数
x的定义域是
x的定义域是- A.<img src="//img1.yqda.net/question-name/e5/cc03232ed67f21f76fe2e49e17f9a9.png" width="86" height="56"/>
- B.<img src="//img1.yqda.net/question-name/f3/a224384077d49a262d215ce35d57f2.png" width="81" height="59"/>
- C.<img src="//img1.yqda.net/question-name/42/2d06ad810a6bf58640c37f216f9dae.png" width="78" height="56"/>
- D.(-1,1)
- 27
-
下列各式中，极限存在的是
- A.<img src="//img1.yqda.net/question-name/c8/b1629fbd2a5cf8813dc8b47f2a1e48.png" width="76" height="34"/>
- B.<img src="//img1.yqda.net/question-name/4f/bb238465cfe0130c60d7313867fc63.png" width="58" height="41"/>
- C.<img src="//img1.yqda.net/question-name/60/b833225a904f6ff12e28cfd6557d2b.png" width="79" height="45"/>
- D.<img src="//img1.yqda.net/question-name/7e/8f55cc371732cb913821ced89277fc.png" width="92" height="42"/>
- 28
-
下列关系式错误的是
- A.<img src="//img1.yqda.net/question-name/91/6bfcc50ce81f5a76e04fc55a454f47.png"/>
- B.<img src="//img1.yqda.net/question-name/e1/d8dea464a4843ecafb56d9eb439791.png" width="98" height="26"/>
- C.<img src="//img1.yqda.net/question-name/a2/8066044b4def98cf75e04c2e715b3e.png" width="57" height="40"/>
- D.<img src="//img1.yqda.net/question-name/4a/1bb7c4ac454b2b1c5fc295404275c4.png" width="59" height="26"/>
- A.Ax+D=0
- B.By+Cz+D=0
- C.Ax+Cz+D=0
- D.Ax+By+D=0
- A.(-a，-b，-c)
- B.(-a，b，-c)
- C.(-a，b，c)
- D.(a,-b，c)
