pure maths

👨🏻‍🏫 學術台數學

2007-05-28 8:58 am

(In)ln y dy

求solution- -

回答 (1)

2007-05-28 9:13 am

✔ 最佳答案

(In)Iny dy
=lny(y)-(IN)y(1/y)dy (Integration by part)
=ylny-y+c

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