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暈.這種題目只要把你知道的相關公式列出來瞄一眼就知道了.教你用一個土辦法吧!例如有這個公式:V末=V初+at所以v初=-at=-3.5a將此公式帶入:s=v初*t+(1/2)*a*t*t得:s1=-3a,s2=-5a,s3=-6a(a為負數),所以啦.3:5:6補充…
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