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设函数f(x)在(-∞,+∞)内满足[(x)=f(x-π)+sinx,且f(x)=x,x∈[0,π),求
设函数f(x)在(-∞,+∞)内满足[(x)=f(x-π)+sinx,且f(x)=x,x∈[0,π),求
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设函数f(x)在(-∞,+∞)内满足[(x)=f(x-π)+sinx,且f(x)=x,x∈[0,π),求
设f(x)在[0, +∞)内连续,且f(x)=1.证明函数
满足微分方程+y=f(x) ,并求
y(x).
设f(x)满足其中g(x)为任一函数,证明:若f(xn)=f(x1)=0(x0<x1),则f在[x0,x3]上恒等于0.
设函数f在[0,a]上具有二阶导数,且|f"(x)|≤M,f,在(0,a)内取得最大值.
证明: