Question

已知，，且，則函數(shù)與函數(shù)的圖象可能是

Answer 1

B

解析試題分析：函數(shù)的圖像和函數(shù)的圖像關(guān)于x軸對(duì)稱。因?yàn)?img src="http://thumb.1010pic.com/pic5/tikupic/14/3/ihwmi1.png" style="vertical-align:middle;" />，所以，所以函數(shù)與函數(shù)的圖象的單調(diào)性相同，A、C排除，又選項(xiàng)D中，，與矛盾，所以選B。
考點(diǎn)：指數(shù)函數(shù)的圖像；對(duì)數(shù)函數(shù)的圖像；函數(shù)圖像的對(duì)稱變換。
點(diǎn)評(píng)：把函數(shù)的圖像關(guān)于x軸對(duì)稱得的圖像；把函數(shù)的圖像關(guān)于y軸對(duì)稱得的圖像；把函數(shù)的圖像關(guān)于原點(diǎn)對(duì)稱得的圖像。