JJ103 题讨论

1、  MingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">說一個商店賣東西，第二年total costMingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">比第一年total costMingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">增加x percent. MingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">問第二年利潤比第一年高嗎？

1 MingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">第二年單價比第一年增加x percent.

2 MingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">第二年賣的數量比第一年少 10 percent

bigurMingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">解答: C2 MingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">＝ C1* (1+X)

1)        S2MingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">＝S1*(1+X)

2)        V2=V1*(1-10%)

MingLiU","serif"; mso-ascii-font-family: Arial; mso-fareast-language: ZH-TW; mso-bidi-font-family: Arial; mso-hansi-font-family: Arial;">要算C2-S2*V2  和C1-S1*V1的大小

C2-S2*V2＝C1* (1+X)－S1* V1*(1-10%)*(1+X)＝(1+X)(C1-0.9*S1*V1}

這個題目啊，考試的時候建議選C吧，不過實際上，如果選C必須有以下的條件：

X>0 , 為啥增長x percent, x不能小於0, 咱們國家不是強調負增長麼？

我怎么算出来是E? 有没有同学指点下。好像bigur的式子列反了

我也觉得是E

不过这题是JJ103吧