
Review Chapter 1, Chapter 4
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Medium
Linh Nguyễn
Used 1+ times
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46 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho phương trình ax + by = c với a ≠ 0, b ≠ 0. Nghiệm tổng quát của phương trình là.
y = -a/b x + c/b
y = -a/x - c/b
y = c/b
y = -c/b
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình nào sau đây là phương trình bậc nhất hai ẩn?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cặp số (x, y) = (3; -2) là nghiệm của phương trình nào sau đây?
3x - y = 10.
2x - 3y = 12.
x + y = 5.
x - 2y = -1.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hệ phương trình nào dưới đây là hệ hai phương trình bậc nhất hai ẩn?
{ x + y = 1; y + z = -3; }
{ 2y = 1; -x + y = 1 }
{ 0x + 0y = 0 }
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cặp số (x, y) = (1; -1) là nghiệm của hệ phương trình nào dưới đây?
{ x + y = 0; 2y - x = 3; }
{ x - 2y = 3; 2x + y = -1; }
{ 5x + y = 7; -x + 3y = -4; }
{ 3x - 2y = 1; x - 3y = 4; }
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hệ phương trình { x - 3y = 21; x + y = -3 } nhận cặp số nào sau đây là nghiệm?
(1; 2)
(8; -3)
(3; -8)
(3; 8)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biết rằng nghiệm của hệ phương trình { 2x + y = 4; 6x - 5y = -12 } là (a; b). Giá trị của T = 2a + 3b là
8
-8
11
10
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