21f的精選

問題詳情：已知f(x)滿足f(4)=f(-2)=1,f′(x)為其導函數,且導函數y=f′(x)的圖象如圖所示,則f(x)<1的解集是()A.(-2,0)                  B.(-2,4)C.(0,4)               D.(-∞,2)∪(...