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下列函数中,值域是(0,+∞)的是A.B.y=2x+1C.y=x2+x+1D.
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下列函数中,值域是(0,+∞)的是( )
A.
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sH8f5gvX/N7HtTz7hQAAAABJRU5ErkJggg==
)
B.y=2x+1
C.y=x
2+x+1
D.
相关试题
-
下列函数中,值域是(0,+∞)的是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFIAAAAbCAYAAADve9g/AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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dMBSKHYAgZsPjUyEIq6EXpu22ByuDU+4hyWEeOcI63tMEPSNGiCZNEAyaYBkUt8gjcLv41AmPOxT
/YK02skID17730ltt/cdqluQ1hiXY7NaOiF18awn9etIKijzN4BMvapinOnq8yOBI0dpZ7oH0jjV
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RV/076uhhisT5sS9EzvGy0CKlKT1bmxlglqQeN2JINKoLfG8p5Zrq9bRpkHbw1x2QVqnZQjmaSvi
Rk5BEs1lbdGW4BxgA4miFUxASu/E1qdjATLuLnEP60EHMXIitTHvgYTfgV3bn46/joRNhKQgubr4
6aaxN7LVp+/9ENmPeTpvkdsZyEanNBUkRbX1w0abePB/+mXMfx0J3ST1xwe0BxIX27ClIDQ6/1XM
f0HS04dV64zghJjDg32Qxi+UXidYRfuk12XMuz2yhdZ1xb/LJNy0fPA1BRkv3OlkPV3AHf1WXFXM
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JJPeCdK5L9f83sdU6S9QAAAAAElFTkSuQmCC
)
B.y=2x+1
C.y=x2+x+1
D.
-
下列函数中,值域是(0,+∞)的是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFIAAAAbCAYAAADve9g/AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAIhSURBVGhD7ZlBDoMgEEU5lwuO456buOYgbjlI
FxxlyqBSQNTBACXGJk3aRhl4/Jn5WAaNX4wxeOS7MUcL8Ymv5qt6QRaS0QvyBXlKoO/UVuLXmIQq
tJV1hukXpJbAN3j42TQpLnUdCgVG7RakVgp8bFpyYFwGvxVYf7EhugW5WyGm+RNA5pjos22+27VR
kW9qe2TvgVQgOlYjLo8psR7Z/IlWTKM7IJUQ0HfPNiCtWGxX5OA3RSXrFPZckJjSnTsfi3BtNiZ1
ApAKZGQ1/lIjTWYEddF8J0NdLZOdN/kmYhNPCM8DydwktVFjrVSiKtLand2TImqK+zUVRfJbGxEV
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L/WQBjF7Cw/O6ZcxcxWJ1cTVx+xZ5t+QrJG42IqGO3lOv4qZC5JF/jEfzckd87h23tFdlAKp8PhX
cx5xnTSzuYyZC7IouGiweZ7tL9PAYJg+i3GN/rPZDLfrrDlekTT5fcaRYvYE0q3TKnNR5QZyK+zO
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sH8f5gvX/N7HtTz7hQAAAABJRU5ErkJggg==
)
B.y=2x+1
C.y=x2+x+1
D.
-
下列函数的值域是(0,+∞)的是( )
A.f(x)=log2
B.f(x)=x2-1
C.f(x)=
x+1
D.f(x)=2x
-
下列函数的值域是(0,+∞)的是( )
A.f(x)=log2
B.f(x)=x2-1
C.f(x)=
x+1
D.f(x)=2x
-
下列函数的值域是(0,+∞)的是( )
A.f(x)=log2
B.f(x)=x2-1
C.f(x)=
x+1
D.f(x)=2x
-
下列函数中,值域是R+的是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFIAAAAbCAYAAADve9g/AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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FxxlyqBSQNTBACXGJk3aRhl4/Jn5WAaNX4wxeOS7MUcL8Ymv5qt6QRaS0QvyBXlKoO/UVuLXmIQq
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kW9qe2TvgVQgOlYjLo8psR7Z/IlWTKM7IJUQ0HfPNiCtWGxX5OA3RSXrFPZckJjSnTsfi3BtNiZ1
ApAKZGQ1/lIjTWYEddF8J0NdLZOdN/kmYhNPCM8DydwktVFjrVSiKtLand2TImqK+zUVRfJbGxEV
wNGmuUNCmMErSA2Sr8EMbVHR+FJBkheculDrwG9iH8gW5an64wx2qb2A5EaJtbtjAHLbXdfoFvUU
9YsYw6dIjXkPJCoZuzc1de7rZa9I3ERME4RIi++cRuohsQfNXbeTYzrm6bjB3A4VaUBW6tIx8lRq
L/WQBjF7Cw/O6ZcxcxWJ1cTVx+xZ5t+QrJG42IqGO3lOv4qZC5JF/jEfzckd87h23tFdlAKp8PhX
cx5xnTSzuYyZC7IouGiweZ7tL9PAYJg+i3GN/rPZDLfrrDlekTT5fcaRYvYE0q3TKnNR5QZyK+zO
cG/dNNunJGj6D4Q9D1kkpm/0vbGbPUYbTVBUZRMfSVJq2YuagfxMA7BhekGW2D9U5avIEiQTzabQ
sH8f5gvX/N7HtTz7hQAAAABJRU5ErkJggg==
)
B.y=2x+3,x∈(0,+∞)
C.y=x2+x+1
D.
-
在区间(-∞,0)上为增函数的是( )
A.y=1
B.y=x+1
C.y=-x2-2x-1
D.
-
已知f(x)=x2-2x+1,则f(-x)=( )
A.-x2+2x-1
B.x2-2x+1
C.x2+2x+1
D.-x2+2x+1
-
已知f(x-1)=x2,则f(x)的表达式为( )
A.f(x)=x2+2x+1
B.f(x)=x2-2x+1
C.f(x)=x2+2x-1
D.f(x)=x2-2x-1
-
下列函数是奇函数的是( )
A.f(x)=x3
B.f(x)=3x-1
C.f(x)=2x2-1
D.