- 4
-
计算
- 6
-
计算
- 9
-
设二元函数
- 10
-
设二元函数
- A.xsiny
- B.-xsiny
- C.siny
- D.-siny
- A.0.54
- B.0.04
- C.0.1
- D.0.4
- A.
- B.
- C.
- D.
- A.
- B.
- C.
- D.
- A.f(b)-f(a)
- B.<img src="//img1.yqda.net/question-name/8b/99ea43893593f1a7ed2c0358608f12.png" width="68" height="39"/>
- C.<img src="//img1.yqda.net/question-name/94/935b46a408ca05adc65acd5477fddf.png" width="63" height="27"/>
- D.<img src="//img1.yqda.net/question-name/8d/05e08063aa30ec276587094bb2d529.png" width="62" height="38"/>
- A.恒大于0
- B.恒小于0
- C.恒等于0
- D.可正,可负
- A.3x^2+ 1/x+1
- B.x^3+ 1/x+1
- C.3x^2
- D.1/x+1
- 26
-
d(sin2x)=
- A.2cos2xdx
- B.cos2xdx
- C.-2cos2xdx
- D.-cos2xdx
- A.-2
- B.-1/2
- C.1/2
- D.2