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章節練習2.2

Authored by mathematics Aristo

Mathematics

9th - 12th Grade

章節練習2.2
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5 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

k 為常數。 若 2x² − 4x + (2 − k) = 0 的兩根的積是 −4,求 k 的值。

A. 6

B. −6

C. 10

D. −10

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

αβx² −8x + 4 = 0 的兩個根,求 (2 + α)(2 + β) 的值。

A. −8

B. 8

C. 16

D. 24

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

k 為常數。若 k 和 4 − kx² + 2ax + a + 6 = 0 的兩個根, 求 k 的值。

A. 2a

B. 2

C. −2a

D. −2

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

k 為常數。若 αβx2 − 6x + (k−1) = 0 的兩個根,則 α2 + 6β =

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

k 為 常 數。 若 αβx2 kx + 3 = 0的兩個根,下列各二次方程中,何者的根是 1+α 和 1+ β?

A. x2 + (k + 2)x + (k + 4) = 0

B. x2 − (k + 2)x + (k + 4) = 0

C. x2 + (k + 1)x + 4 = 0

D. x2 − (k + 1)x + 4 = 0

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