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Hệ hai phương trình bậc nhất hai ẩn

Quiz by Hưng Hoàng Văn

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Q 1/10
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29

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10 questions

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Q1
30s
Q2
Hệ phương trình nào sau đây có nghiệm x = 2, y = -1?
\ $\begin{cases} 2x + y = 5 \\ x - y = 1 \end{cases}\$
\ $\begin{cases} x - y = 3 \\ x + 2y = 1 \end{cases}\$
\ $\begin{cases} x + y = 2 \\ 2x + y = 4 \end{cases}\$
\ $\begin{cases} 3x - y = 7 \\ x + y = 1 \end{cases}\$
30s
Q3
30s
Q4
Hệ phương trình nào sau đây vô nghiệm?
\ $\begin{cases} x + y = 1 \\ x + y = 2 \end{cases}\$
\ $\begin{cases} 2x + 3y = 6 \\ 4x + 6y = 12 \end{cases}\$
\ $\begin{cases} x - 2y = 3 \\ 2x + y = 4 \end{cases}\$
\ $\begin{cases} x + y = 1 \\ x - y = 0 \end{cases}\$
30s
Q5
30s
Q6
30s
Q7
30s
Q8
30s
Q9
30s
Q10
30s

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