函数图象的变换图图象象变变换换伸缩变换伸缩变换伸缩变换例12例3例4)(xfy )(axfy向左(a0)右(a0)下(b1时|loglogxyxyaya轴翻折沿| 1|log1xya单位左移XY)间是(那么函数的单调递增区时总有当、函数例, 0)0 , 1(|1|log3yxxya), 1)(),0)() 1,)()0 ,)(DCBA1)a1时|loglogxyxyaya轴翻折沿| 1|log1xya单位左移2)0a1时XY菜单D例4函数y=f(1-x)与函数y=f(x-1)的图象的对称轴方程为( )(A)x=0 (B)y=0 (C)x=1 (D)x=-1)1()(xfxf向右平移一个单位)1 ()1()(1xfxfxf个单位向右平移关于y轴对称个单位对称轴向右平移 1关于直线x=一对称xyO11)(xf)( xf ) 1( xf)1 (xfD