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7. 關於方程式 89 ( x-2 )2=93 的兩根,下列判斷何者正確?(A) 一根小於-2,另一根大於 2 (B) 一根小於 1,另一根大於 3(C) 兩根都小於 0 (D) 兩根都大於 2
問題詳情
7. 關於方程式 89 ( x-2 )2=93 的兩根,下列判斷何者正確?
(A) 一根小於-2,另一根大於 2
(B) 一根小於 1,另一根大於 3
(C) 兩根都小於 0
(D) 兩根都大於 2
參考答案
上一篇 :
6. 已知 a、b、c 為整數,欲使一元二次方程式 ax2+2bx+c=0 的兩個解都是不含根式的分數,則 b2-4ac 的值不可能為何?(A) 0 (B) 4 (C) 8 (D) 9.
下一篇 :
8. 下列方程式中,何者的解是相異兩根?(A) 9x2-6x+1=0 (B) 2x2-2x+4=0(C) x2+4x+4=0 (D) x2-9=0
資訊推薦
9. 已知連續三偶數的平方和為 596,則下列何者不可能是此三整數之一?(A) 10 (B) -12 (C) 14 (D) -16
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