[理工] 工數台聯大100工數c

[AAJJBurnett (叫我投手)]

 Given y1(x)=x^r is one solution of the homegeneous 2nd order linear

 differential equation x^2y"-5xy+9y=0

 1. Derive its characteristic equation in terms of parameter r.



 請問題目有出錯嗎?  如果沒錯要怎麼算

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