Trắc Nghiệm Hàm Số Bậc Hai

Quiz
•
Mathematics
•
10th Grade
•
Hard
Lý Thị
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hàm số 𝑦 = 2𝑥² − 4𝑥 + 1. Hệ số a, b, c lần lượt là:
𝑎 = 2, 𝑏 = −4, 𝑐 = 1
𝑎 = −2, 𝑏 = 4, 𝑐 = 1
𝑎 = 2, 𝑏 = 4, 𝑐 = −1
𝑎 = 2, 𝑏 = −4, 𝑐 = −1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hàm số 𝑦 = −𝑥² + 6𝑥 đạt giá trị lớn nhất khi:
𝑥 = 2
𝑥 = 3
𝑥 = −3
𝑥 = 6
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đỉnh của đồ thị hàm số 𝑦 = −2𝑥² + 8𝑥 − 5 là:
(2,3)
(1,5)
(2,−5)
(4,−3)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hàm số 𝑦 = 𝑎𝑥² + 𝑏𝑥 + 𝑐 có đồ thị là một parabol. Phát biểu nào đúng?
Parabol luôn đi qua gốc tọa độ
Nếu 𝑎 > 0, parabol hướng lên
Nếu 𝑏 > 0, parabol hướng xuống
Nếu 𝑐 > 0, parabol không cắt trục hoành
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho biểu thức diện tích 𝐴(𝑥) = −2𝑥² + 20𝑥. Giá trị lớn nhất của A là:
50
25
20
10
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