Target Exam

CUET

Subject

-- Applied Mathematics - Section B2

Chapter

Algebra

Question:

For the system $\begin{bmatrix}2&-3\\-4&6\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}5\\-10\end{bmatrix}$ which of the following statements are correct?

(A) The system has no solution.
(B) The system is consistent.
(C) It has infinitely many solutions.
(D) It has a unique solution.

Choose the correct answer from the options given below:

Options:

(B) and (D) only

(A), (B) and (C) only

(A) and (D) only

(B) and (C) only

Correct Answer:

(B) and (C) only

Explanation:

The correct answer is Option (4) → (B) and (C) only

Solution of the system:

$2x-3y=5$

$-4x+6y=-10$

Second equation is $-2$ times the first equation.

So both equations represent the same line.

Hence the system is consistent and has infinitely many solutions.

final answer: $\text{(B) and (C)}$