
Nhóm 3- chủ đề 2
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Mathematics
10th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1: Tọa độ tâm I và bán kính R của đường tròn (C): (x – 1)2 + (y + 3)2 = 16 là:
I(–1; 3), R = 4
I(1; –3), R = 4
I(1; –3), R = 16
I(–1; 3), R = 16
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2: Đường tròn (C) có tâm I(1; –5) và đi qua O(0; 0) có phương trình là:
(x + 1)2 + (y – 5)2 = 26
(x + 1)2 + (y – 5)2 = √26
(x – 1)2 + (y + 5)2 = 26
(x – 1)2 + (y + 5)2 = √26
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3: Đường tròn (C): x2 + y2 + 12x – 14y + 4 = 0 viết được dưới dạng:
(x + 6)2 + (y – 7)2 = 9
(x + 6)2 + (y – 7)2 = 81
(x + 6)2 + (y – 7)2 = 89
(x + 6)2 + (y – 7)2 = √89
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 4: Đường tròn (C) có tâm I(2; –3) và tiếp xúc với trục Oy có phương trình là:
(x + 2)2 + (y – 3)2 = 4
(x + 2)2 + (y – 3)2 = 9
(x – 2)2 + (y + 3)2 = 4
(x – 2)2 + (y + 3)2 = 9
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 5: Đường tròn (C): x2 + y2 – 6x + 2y + 6 = 0 có tâm I và bán kính R là:
I(3; –1), R = 4
I(–3; 1), R = 4
I(3; –1), R = 2
I(–3; 1), R = 2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 6: Tọa độ tâm I của đường tròn đi qua ba điểm A(0; 4), B(2; 4), C(4; 0) là:
I(0; 0)
I(1; 0)
I(3; 2)
I(1; 1)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 7: Trong các phương trình sau, phương trình nào là phương trình của một đường tròn?
4x2 + y2 – 10x – 6y – 2 = 0
x2 + y2 – 2x – 8y + 20 = 0
x2 + 2y2 – 4x – 8y + 1 = 0
x2 + y2 – 4x + 6y – 12 = 0
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