设/(兀)是周期为2的连续函数.证明:⑴对V/g R,都有 J ⑵g    (1 )证明:「2/(兀)力=(兀)dx +Jo+J; f^x)dx =J:/(x)cZx +广/(兀)必+匚/(兀)么 =J:/(x)〃 +广/(—2)〃(兀-2) + 匸/(兀皿= j"/(x)tZr-[°/(

设/(兀)是周期为2的连续函数.证明:⑴对V/g R,都有 J ⑵g    (1 )证明:「2/(兀)力=(兀)dx +Jo+J; f^x)dx =J:/(x)cZx +广/(兀)必+匚/(兀)么 =J:/(x)〃 +广/(—2)〃(兀-2) + 匸/(兀皿= j"/(x)tZr-[°/(

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