Trắc nghiệm Chương 3: Ôn tập chương III có đáp án (Thông hiểu) !!

A. $\left\{\begin{array}{l}x-y=-2\\ x+y=4\end{array}\right.$

B. $\left\{\begin{array}{l}2x-y=0\\ x+y=4\end{array}\right.$

C. $\left\{\begin{array}{l}x+y=4\\ 2x+y=4\end{array}\right.$

D. $\left\{\begin{array}{l}{x}^2+y^2=10\\ x-y=2\end{array}\right.$

A. (−1; −2)

B. (2; 2)

C. (2; −1)

D. (3; 2)

A. $m=\frac{1}{2}$

B. $m=\frac{19}{10}$

C. $m=\frac{3}{10}$

D. Không có giá trị m

A. (3; 1)

B. (1; 3)

C. (−1; −3)

D. (−3; −1)

A. (−1; −1)

B. (1; 2)

C. (−1; 1)

D. (1; 1)

A. $\left\{\begin{array}{l}x-y=3\\ 2x+y=4\end{array}\right.$

B. $\left\{\begin{array}{l}2x-y=-1\\ x-3y=8\end{array}\right.$

C. $\left\{\begin{array}{l}2x-y=-1\\ x-3y=7\end{array}\right.$

D. $\left\{\begin{array}{l}4x-2y=0\\ x-3y=5\end{array}\right.$

A. $\left\{\begin{array}{l}x-3y=1\\ x+y=2\end{array}\right.$

B. $\left\{\begin{array}{l}3x+y=4\\ 2x-y=11\end{array}\right.$

C. $\left\{\begin{array}{l}y=-1\\ x-3y=5\end{array}\right.$

D. $\left\{\begin{array}{l}4x-y=0\\ x-3y=0\end{array}\right.$