证明：曲线积分有估计式[tex=13.643x2.786]gE3/xyQY+/PN5JJ22LQZtOiIqU+EaBTkEYWCC+6tHk3jhLL0owsizCYgUr+W7SI09GyKk5D0AKdvzs7OHTDQiXD0eAOg5cAWh4lQrkKvDnM=[/tex]，其中[tex=0.714x1.0]Hl8mr56J4t0Ek5ZoqbFYYg==[/tex]为积分路径的长度，[tex=4.5x2.0]+p6C3GwYvZROoY/ydkReC6WYfuXe35votylqH6vLMw4=[/tex][tex=4.214x1.643]McrF8nInkMohFn6p3T4dc5KNU9rte+g3O5P1a6g4/FA=[/tex].
证明：曲线积分有估计式[tex=13.643x2.786]gE3/xyQY+/PN5JJ22LQZtOiIqU+EaBTkEYWCC+6tHk3jhLL0owsizCYgUr+W7SI09GyKk5D0AKdvzs7OHTDQiXD0eAOg5cAWh4lQrkKvDnM=[/tex]，其中[tex=0.714x1.0]Hl8mr56J4t0Ek5ZoqbFYYg==[/tex]为积分路径的长度，[tex=4.5x2.0]+p6C3GwYvZROoY/ydkReC6WYfuXe35votylqH6vLMw4=[/tex][tex=4.214x1.643]McrF8nInkMohFn6p3T4dc5KNU9rte+g3O5P1a6g4/FA=[/tex].
设[tex=0.714x1.0]ravtxd2oof9d0U26ZFAIhw==[/tex]是光滑弧段, 弧长为[tex=3.857x1.214]B9f/WEYYT0Ews4H7FrGD9w==[/tex]是在[tex=0.714x1.0]ravtxd2oof9d0U26ZFAIhw==[/tex]上连续的三个函数, 且[tex=12.571x2.5]5zgJTm0DIirQbjeQE9y1iajX998hh3ZWCFUtC/7srNw2L/Rw9XGMPKZN9IXD/oXISNOwOfGhts2b5vKGnayX8OahR424nQHzcL2/FWdv91U=[/tex]试证明 [tex=12.357x2.786]gE3/xyQY+/PN5JJ22LQZtAi5KZbEwlr2gjF1vzRFOWx4itjzu8iKLjFaFD8/UY0ynF5RNjjB3Qqzr9pWzPVgvV7JZCLB6ROu6t4rFYr2O8I4LICiKiZD08goK6HCqD8t[/tex]
设[tex=0.714x1.0]ravtxd2oof9d0U26ZFAIhw==[/tex]是光滑弧段, 弧长为[tex=3.857x1.214]B9f/WEYYT0Ews4H7FrGD9w==[/tex]是在[tex=0.714x1.0]ravtxd2oof9d0U26ZFAIhw==[/tex]上连续的三个函数, 且[tex=12.571x2.5]5zgJTm0DIirQbjeQE9y1iajX998hh3ZWCFUtC/7srNw2L/Rw9XGMPKZN9IXD/oXISNOwOfGhts2b5vKGnayX8OahR424nQHzcL2/FWdv91U=[/tex]试证明 [tex=12.357x2.786]gE3/xyQY+/PN5JJ22LQZtAi5KZbEwlr2gjF1vzRFOWx4itjzu8iKLjFaFD8/UY0ynF5RNjjB3Qqzr9pWzPVgvV7JZCLB6ROu6t4rFYr2O8I4LICiKiZD08goK6HCqD8t[/tex]