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[单选题]
若f(x+1)=x2-2x+3,则f(x)=()
A.x2+2x+6
B.x2+4x+6
C.x2-2x+6
D.x2-4x+6
查看答案
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A.x2+2x+6
B.x2+4x+6
C.x2-2x+6
D.x2-4x+6
A.若y=3,则y'=0
B.若f(x)=3x+1,则f'(1)=3
C.若y=-√x+x,则y'=-1/2√x+1
D.若y=sinx+cosx,则y'=cosx+sinx
已知函数f(x)=1og3(x+1)+log3(5-x),则f(x)的()
A.最大值为3
B.最大值为9
C.最大值为2
D.最小值为2
已知f(x)=x2-3x+2,求:f(0),f(1),f(2),f(-x),(x≠0),f(x+1)