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【单选题】
如果函数f(x)的导函数为 ,则f(x)的一个原函数是( )
A.
1+sinx
B.
1-sinx
C.
1+cosx
D.
1-cosx
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D.
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A.
(-3,0]
B.
(0,+∞)
C.
(-3,+∞)
D.
[-3,+∞)
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A.
[0,+ )
B.
(0,+ )
C.
R
D.
(- ,0)
【单选题】已知函数 是幂函数,则该函数的定义域为( )
A.
[0,+ )
B.
(0,+ )
C.
{ x|x 0}
D.
R
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A.
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B.
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C.
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D.
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【单选题】已知函数 是幂函数,则该函数的定义域为( )
A.
R
B.
{x|x }
C.
[0,+ )
D.
(0,+ )
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