Re: [理工] [工數]-拉式 ....怪怪的?
※ 引述《ntust661 (Enstchuldigung~)》之銘言：
: ※ 引述《topee (eason)》之銘言：
: : 1 1 1 1 s-4
: : Y= ---------- + --- ---- - --- -----------[e^-s - e^-2s]
: : (s-2)^2+1 5 s 5 s^2-4s+5
: 1 1 1 1 s - 2 - 2
: Y = ─────── + ── ── - ── (──────── + ───────)
: (s - 2)^2 + 1 5 s 5 (s - 2)^2 + 9 (s - 2)^2 + 9
↑怎麼變+9?
s^2-4s+5= (s-2)^2+1?
: -s -2s
: [ e - e ]
: 2t 1 1 2(t-1) 2 2(t-1)
: y = sint e + ── - ── ( cos3(t-1) e - ── sin3(t-1) e ...
: 5 5 3
↑是t還是2t? 怎麼變2t的?
: 2(t-2) 2 2(t-2)
: + cos3(t-2) e - ── sin3(t-2) e
: 3
: : 之後該怎麼分解 我又一頭霧水...
: 慢慢算 一切都可以迎刃而解
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