成人高考专升本《高等数学一》深度押密试卷(1)
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设y=x+sinx,则y=
- A.sinx
- B.x
- C.x+cosx
- D.1+cosx
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- A.0
- B.1
- C.2
- D.+∞  
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设函数f(x)在[a,b]上连续,且f(a)·f(b)<0,则必定存在一点ξ∈(a,b)使得
- A.f(ξ)>0
- B.f(ξ)<0
- C.f(ξ)=0
- D.f(ξ)=0
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- A.2ex+C
- B.ex+C
- C.2e2x+C
- D.e2x+C &n
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设函数f(x)在[a,b]上连续,则曲线y=f(x)与直线x=a,x=b,y=0所围成的平面图形的面积等于( )
- A.<img src="//img1.yqda.net/question-name/fd/ae4bb8b48a7db704f39ea66367c090.jpg" alt="" border="0"/>
- B.<img src="//img1.yqda.net/question-name/59/d425de8889a32137a315c745797f41.jpg" alt="" border="0"/>
- C.<img src="//img1.yqda.net/question-name/91/7597ea8355f2a5ae8775fb722bf806.jpg" alt="" border="0"/>
- D.<img src="//img1.yqda.net/question-name/1d/1bedfdfdcf73c0fa4debd2ede669bb.jpg" alt="" border="0"/>  
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设a={-1,1,2),b={3,0,4},则向量a在向量b上的投影为
- A.<img src="//img1.yqda.net/question-name/71/0611c56cd6a5e4a9b06f2bca09752d.jpg" alt="" border="0" />
- B.1
- C.<img src="//img1.yqda.net/question-name/35/313a66e99b81a12961c4cf1019167b.jpg" alt="" border="0" />
- D.-1
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过点(1,0,O),(0,1,O),(0,0,1)的平面方程为
- A.x+y+z=1
- B.2x+y+z=1
- C.x+2y+z=1
- D.x+y+2z=1
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- A.sinx+C
- B.cosx+C
- C.-sinx+C
- D.-cosx+C
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直线l与x轴平行,且与曲线y=x-ex相切,则切点的坐标是
- A.(1,1)
- B.(-1,1)
- C.(0,-l)
- D.(0,1)