[理工] [工數][聯立ode]

[asdf322505 ()]

y1'= -9y1+4y2-4y3
y2'= -15y1+7y2-5y3
y3'= 15y1-6y2+8y3


ans;  y1=2c1e^t+c3e^3t
      y2=5c1e^t+c2e^2t
      y3=c2e^2t-3c3e^3t

這題怎嚜解?

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