如果函数f(x)=ax²+bx+c(a>0)对任意实数t都有f(2+t)=f(2-t) 那么( )A f(1)<f(2)<f(4) B f(2)<f(1)<f(4) C f(2)<f(4)<f(1) D f(4)<f(2)<f(1)
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![如果函数f(x)=ax²+bx+c(a>0)对任意实数t都有f(2+t)=f(2-t) 那么( )A f(1)<f(2)<f(4) B f(2)<f(1)<f(4) C f(2)<f(4)<f(1) D f(4)<f(2)<f(1)](/uploads/image/z/15153684-60-4.jpg?t=%E5%A6%82%E6%9E%9C%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Dax%26%23178%3B%2Bbx%2Bc%EF%BC%88a%EF%BC%9E0%EF%BC%89%E5%AF%B9%E4%BB%BB%E6%84%8F%E5%AE%9E%E6%95%B0t%E9%83%BD%E6%9C%89f%EF%BC%882%2Bt%EF%BC%89%3Df%EF%BC%882-t%EF%BC%89+%E9%82%A3%E4%B9%88%EF%BC%88+%EF%BC%89A+f%EF%BC%881%EF%BC%89%EF%BC%9Cf%EF%BC%882%EF%BC%89%EF%BC%9Cf%EF%BC%884%EF%BC%89+B+f%EF%BC%882%EF%BC%89%EF%BC%9Cf%EF%BC%881%EF%BC%89%EF%BC%9Cf%EF%BC%884%EF%BC%89+C+f%EF%BC%882%29%EF%BC%9Cf%EF%BC%884%EF%BC%89%EF%BC%9Cf%EF%BC%881%EF%BC%89+D+f%EF%BC%884%EF%BC%89%EF%BC%9Cf%EF%BC%882%EF%BC%89%EF%BC%9Cf%EF%BC%881%EF%BC%89)
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如果函数f(x)=ax²+bx+c(a>0)对任意实数t都有f(2+t)=f(2-t) 那么( )A f(1)<f(2)<f(4) B f(2)<f(1)<f(4) C f(2)<f(4)<f(1) D f(4)<f(2)<f(1)
如果函数f(x)=ax²+bx+c(a>0)对任意实数t都有f(2+t)=f(2-t) 那么( )
A f(1)<f(2)<f(4) B f(2)<f(1)<f(4)
C f(2)<f(4)<f(1) D f(4)<f(2)<f(1)
如果函数f(x)=ax²+bx+c(a>0)对任意实数t都有f(2+t)=f(2-t) 那么( )A f(1)<f(2)<f(4) B f(2)<f(1)<f(4) C f(2)<f(4)<f(1) D f(4)<f(2)<f(1)
开口向上,以2为对称轴,故f(2)肯定最少,离对称轴越远则越大,选B