S4 chap 2.2 兩根的和與兩根的積
Authored by wing lo
Mathematics
9th Grade
Used 4+ times
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9 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
求 x2 + 7x + 2 = 0 的兩根之和及兩根之積。
兩根之和= -7, 兩根之積=2
兩根之和= -7, 兩根之積= -2
兩根之和= 7, 兩根之積=2
兩根之和= 7, 兩根之積=- 2
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
求 x2 – 3x – 8 = 0 的兩根之和及兩根之積。
兩根之和= – 3, 兩根之積= – 8
兩根之和= 3, 兩根之積= 8
兩根之和= – 3, 兩根之積= 8
兩根之和= 3, 兩根之積= – 8
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
若 α 和 β 是方程x2 + 3x – 4 = 0的根，求α + β 的值。
3
– 3
4
– 4
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
若 α 和 β 是方程x2 + 3x – 4 = 0的根，求αβ 的值。
4
– 4
3
– 3
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
若 α 和 β 是方程x2 + 3x – 4 = 0的根，求(α + 1)(β + 1) 的值。
– 3
3
6
– 6
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
若 α 和 β 是方程x2 + 3x – 4 = 0的根，求α2 + β2 的值。
17
– 17
9
– 9
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
試建立一個以x為未知數而根是 1 和 3 的二次方程。
x2 + 4x + 3 = 0。
x2 + 4x –3 = 0。
x2 – 4x + 3 = 0。
x2 – 4x – 3 = 0。
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