17.已知偶函数f(x)在区间[0,+∞)上是增函数,则f(-1)与f(a2-2a+3)的大小关系是( )
A. | f(-1)≥f(a2-2a+3) | B. | f(-1)≤f(a2-2a+3) | C. | f(-1)>f(a2-2a+3) | D. | f(-1)<f(a2-2a+3) |
14.定义在[-1,1]上的偶函数y=f(x)满足:对于任意的x1,x2∈[0,1](x1≠x2),都有(x2-x1)(f(x2)-f(x1))>0,则满足f(2x-1)≤f(2x)的x的取值范围是( )
0 249909 249917 249923 249927 249933 249935 249939 249945 249947 249953 249959 249963 249965 249969 249975 249977 249983 249987 249989 249993 249995 249999 250001 250003 250004 250005 250007 250008 250009 250011 250013 250017 250019 250023 250025 250029 250035 250037 250043 250047 250049 250053 250059 250065 250067 250073 250077 250079 250085 250089 250095 250103 266669
A. | [$\frac{1}{4}$,$\frac{1}{2}$] | B. | [$\frac{1}{4}$,1] | C. | [0,1] | D. | [0,$\frac{1}{2}$] |