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[主观题]
设f(x),g(x)在区间[-a,a](a>0)上连续,g(x)为偶函数,f(x)满足f(x)+f(-x)=A(A为常数).试证并用该
设f(x),g(x)在区间[-a,a](a>0)上连续,g(x)为偶函数,f(x)满足f(x)+f(-x)=A(A为常数).试证并用该
设f(x),g(x)在区间[-a,a](a>0)上连续,g(x)为偶函数,f(x)满足f(x)+f(-x)=A(A为常数).试证
并用该等式计算积分;
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设f(x),g(x)在区间[-a,a](a>0)上连续,g(x)为偶函数,f(x)满足f(x)+f(-x)=A(A为常数).试证
并用该等式计算积分;
设f(x)在区间[a,b]上连续,g(x)在区间[a,b]上连续且不变号.证明至少存在一点
x[a,b],使下式成立
设函数f(x),g(x)在[a,b]上连续,且g(x)>0。利用闭区间上连续函数性质,证明存在一点ξ∈[a,b],使
证明:若函数f.g在区间[a,b]上可导,且则在(a,b]内有f(x)>g(x).