[理工] [工數]-交大93-電子(甲組)
題目: Solve the initial value problem
y'' = (y')^2 + y'y with y(0)=1, y'(0)=-2
答案: y=-1 + 2*exp(-x)
想法: 當成缺x型去做, 令y'=z , y'' = z* dz/dy 代入
過程中卡住@@
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