如题所述
就第1æ¥å°±å¯ä»¥äºæ¯å§ï¼
â«e^(y/x) dy
=x *â« e^(y/x) d(y/x)
=x *e^(y/x)
ä»£å ¥y/xçä¸ä¸éxåx^2
=x *(e-e^x)追é®
â«e^(y/x) dy
=x *â« e^(y/x) d(y/x)
=x *e^(y/x)
ä»£å ¥y/xçä¸ä¸éxåx^2
=x *(e-e^x)追é®
åé¢ä¹äºä¸ä¸ªxæ¯æä¹æ¥çï¼æä¸ä¼è¿ä¸ªè½¬æ¢è¶ï¼æ±æå¦
追çdy=x *d(y/x)
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