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設f(x)是你的任意函數.存在性證明:做g(x)= [f(x)+f(-x)]/2,h(x)= [f(x)-f(-x)]/2,易驗,以上兩函數分別是偶函數和奇函數,且f(x)= g(x)+h(x).唯一性證明:設f(x)= g1(x)+h1(x),(…
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