设f(x)∈C[-π,π],且f(x)=
举一反三
- 设函数f(x)在(-∞,+∞)内满足f(x)=f(x-π)+sinx且f(x)=x(x∈[0,π])则
- 设f(x)在[a,b]上连续,且f(x)不恒等于零,证明∫(a,b)[f(x)]²dx>0
- 设f(x)在区间[-π,π]上连续且满足f(x+π)=-f(x),则f(x)的傅里叶系数a2n=______.(n=1,2,…)
- 设f′(x)存在,则[∫df(x)]′=() A: f(x) B: f′(x) C: f(x)+c D: f′(x)+c
- 设函数f(x)具有任意阶导数,且f"(x)=[f(x)]2,则f(n)(x)=______ A: n![f(x)]n+1 B: n[f(x)]n+1 C: (n+1)[f(x)]n+1 D: (n+1)![f(x)]n+1