2014年成人高考专升本《高数二》应试模拟题(6)
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1、
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A.2x+1
B.2xy+1
C.x2+1
D.x2
2、设?(x)具有任意阶导数,且,?ˊ(x)=2f(x),则?″ˊ(x)等于( ).
A.2?(x)
B.4?(x)
C.8?(x)
D.12?(x)
3、
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A.可微
B.不连续
C.无切线
D.有切线,但该切线的斜率不存在
4、
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A.
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B.
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C.
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D.
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5、
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A.
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B.
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C.
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D.
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6、设函数z=x2+y2,2,则点(0,0)( ).
A.不是驻点
B.是驻点但不是极值点
C.是驻点且是极大值点
D.是驻点且是极小值点
7、图2-5—1所示的?(x)在区间[α,b]上连续,则由曲线y=?(x),直线x=α,x=b及x轴所围成的平面图形的面积s等于( ).
A.
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B.
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C.
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D.
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8、
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A.2(x-y)
B.2(x+y)
C.4
D.2
9、
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A.2h
B.α·2α-1
C.2 αln 2
D.0
10、
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A.-2
B.-1
C.1/2
D.1
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