已知函数f(x)在R上可导,其导函数为f′(x),若f(x)满足:(x-1)[f′(x)-f(x)]>0,f(2-x)=f(x)e2-2x,则下列判断一定正确的是(  ) A.f(1)<f(0) B.f(2)>ef(0) C.f(3

问题描述:

已知函数f(x)在R上可导,其导函数为f′(x),若f(x)满足:(x-1)[f′(x)-f(x)]>0,f(2-x)=f(x)e2-2x,则下列判断一定正确的是(  )
A. f(1)<f(0)
B. f(2)>ef(0)
C. f(3)>e3f(0)
D. f(4)<e4f(0)

令g(x)=

f(x)
ex
,则g(x)=
f(x)−f(x)
ex

∵f(x)满足:(x-1)[f′(x)-f(x)]>0,
∴当x<1时,f′(x)-f(x)<0.∴g′(x)<0.此时函数g(x)单调递减.
∴g(-1)>g(0).即
f(−1)
e−1
f(0)
e0
=f(0)

∵f(2-x)=f(x)e2-2x,∴f(3)=f(-1)e4>e-1f(0)•e4=e3f(0).
故选C.