若函数f(x)=x2+bx+c对任意实数都有f(2+x)="f(2-x)," 则
A.f(2)<f(1)<f(4) | B.f(1)<f(2)<f(4) | C.f(2)<f(4)<f(1) | D.f(4)<f(2)<f(1) |
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若函数f(x)=x2+bx+c对任意实数都有f(2+x)="f(2-x)," 则
A.f(2)<f(1)<f(4) | B.f(1)<f(2)<f(4) | C.f(2)<f(4)<f(1) | D.f(4)<f(2)<f(1) |