解
f(x)=x²-1
對稱軸為x=0,開口向上
則
當(dāng)x=0時,f(x)取得最小值:f(0)min=-1
當(dāng)x=2時,f(x)取得最大值:f(2)max=3
∴值域為:[-1.3]
求函數(shù)值域f(x)=x²-1,x∈[-1,2]
求函數(shù)值域f(x)=x²-1,x∈[-1,2]
數(shù)學(xué)人氣:110 ℃時間:2020-04-08 21:31:12
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