[中學] 國中段考爭議
題目如下:
a:b=3:5, 則下列敘述何者錯誤?
(A) a+b : ab = 8 :15
(B) 略(無爭議)
(C) 略
(D) (a+3): (b+5)=3:5
命題老師答案給(A)
(A)的部分錯誤應該無爭議
但(D) 的部分,如果a=-3,b=-5,就不成立了
但命題老師的講法是:比的後項不得為0,所以b不能等於-5
所以仍然成立,個人認為這是倒果為因的說法,校內老師也
分為兩派的意見,所以想來問問各位先進的意見。
不知大家有沒有看過相關題目,如果有相關的題目或看法,
也請提供給我,其實不論我的看法正確或錯誤,只希望能傳
遞給學生正確的知識,在此先感謝大家了!
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