答案:C.14 解析:将 x=5 代入 y^=3x−1,得 y^=3×5−1=14。
答案:B.0,0 解析:ReLU 定义为 f(z)=max(0,z)。当 z=−5<0 时,f(z)=0,且负半轴上 f′(z)=0。
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