matlab 一道积分运算题目求解释用matlab计算两种方法两种答案,法1:int(0.12*x/(2.8-x),x,0,1.27273)ans =- (42*log(34391063014470689/63050394783186944))/125 - 17195599061229753/112589990684262400>> - (42*log(34391063014470689/630503

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