
本章總複習 2
Authored by mathematics Aristo
Mathematics
9th - 12th Grade

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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
設 k 為常數。若二次方程 3x² + (2k + 1)x + 9 = 2 的判別式的值是 −59,則 k =
A. 2 或 −3。
B. 3 或 −4。
C. 5 或 −5。
D. 7 或 −7。
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
設 k 為常數及 k ≠ 2。求 k 值的範圍使得二次方程 kx² − 8x +1 =2x² 有兩個相異的實根。
A. k <16
B. k ≥16
C. k <18
D. k ≥18
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若 a < 0、b > 0 及 c > 0,則二次方程 ax² + bx + c = 0
A. 沒有實根。
B. 有兩個相異的正實根。
C. 有兩個相異的負實根。
D. 一個正實根和一個負實根。
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若 α 和 β 是二次方程 2x² − 4x − k =0 的兩個根,下列何者是以 α − 1 和 β − 1 為根的二次方程?
A. 2x² − k + 2 = 0
B. 2x² − k − 2 =0
C. 2x² + 2x − k + 2 = 0
D. 2x² − 2x − k − 2 = 0
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若 5 + 4i 是二次方程 x² + px + 41 =0 的一個根,則 p =
A. −10。
B. −5。
C. 5。
D. 10。
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
設 k 為常數。若二次方程 x2 − 2(3− k)x + 64 = 0 有兩個相等的負數根,則 k =
A. −8。
B. −5。
C. 8。
D. 11。
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
設 k 為常數。若二次方程 x2 + (3k + 2)x + 6k = 0 有等根,則二次方程 kx2 − 4x + 2k −1 = 0
A. 沒有實根。
B. 有等根。
C.有兩個相異的正實根。
D. 有兩個相異的負實根。
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