Question

下列函數(shù)圖象中不正確的是（ ）
A．
B．
C．
D．

Answer 1

【答案】分析：直接法，A，B兩個(gè)函數(shù)圖象分別為指數(shù)函數(shù)和對(duì)數(shù)函數(shù)圖象，C中函數(shù)解析式加了絕對(duì)值，即對(duì)數(shù)函數(shù)y=|log₂x|與y=log₂x圖象0＜x＜1時(shí)的圖象關(guān)于x軸對(duì)稱，C正確，D為偶函數(shù)，圖象錯(cuò)誤．
解答：解：A，B兩個(gè)函數(shù)圖象分別為指數(shù)函數(shù)和對(duì)數(shù)函數(shù)圖象，正確；
選項(xiàng)C中函數(shù)解析式加了絕對(duì)值，即對(duì)數(shù)函數(shù)y=|log₂x|與y=log₂x圖象0＜x＜1時(shí)的圖象關(guān)于x軸對(duì)稱，C正確；
D為偶函數(shù)，圖象錯(cuò)誤．
故選D．
點(diǎn)評(píng)：本題考查指數(shù)、對(duì)數(shù)函數(shù)的圖象，能使學(xué)生進(jìn)一步認(rèn)識(shí)指數(shù)函數(shù)，對(duì)數(shù)函數(shù)的圖象與性質(zhì)．