解由函數(shù)y=2sinwx+2在[-π/3,π/4]是減函數(shù)得函數(shù)y=2sinwx在[-π/3,π/4]是減函數(shù)由y=sinx的圖像知w＜0又由函數(shù)y=2sinwx在[-π/3,π/4]是減函數(shù)且函數(shù)y=2sinwx是奇函數(shù)圖像關(guān)于原點(diǎn)對(duì)稱(chēng)知2π//w/≥π/3即/w/≤6且w≠...??з??????A(0,3/2)B{-2/3,0)C(0,2)D{-2,0)????????????????y=2sinwx+2??[-??/3,??/4]???????ú???y=2sinwx??[-??/3,??/4]?????????y=sinx??????w??0???????y=2sinwx??[-??/3,??/4]????????????y=2sinwx???溯??????????????2??//w/??1/4???/3??2/w/??3??w??0??/w/??3/2??w??0??0??w??3/2??-3/2??w??0????w??0??-3/2??w??0?B