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17. 如圖(八) 右圖為二次函數 y=ax2+bx+c 的圖形,下列敘述何者正確? (A)a < 0 (B)c > 0 (C)b2-4ac > 0 (D)以上皆是
問題詳情
17. 如圖(八) 右圖為二次函數 y=ax2+bx+c 的圖形,下列敘述何者正確?
(A)a < 0
(B)c > 0
(C)b2-4ac > 0
(D)以上皆是
參考答案
答案:D
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27.若3(2x-1)的值與2(3x-1)的值互為相反數,則x值為何?(A)-1(B)2(C) (D)
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19. 觀察下圖,下列敘述何者正確? (A) ∠BAC<∠DAB(B) ∠CAB<∠DAC(C) ∠BAC=∠DAB(D) ∠CAB>∠DAC
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