JEE Advanced 2022 Mathematics question

MathematicsMatricesJEE Advanced 2022

Let be nonzero real numbers that are, respectively, the , and terms of a harmonic progression. Consider the system of linear equations

x + y + z = 1

10x + 100y + 1000z = 0

qr x + pr y + pq z = 0.

List-I (I) If , then the system of linear equations has (II) If , then the system of linear equations has (III) If , then the system of linear equations has (IV) If , then the system of linear equations has List-II (P) as a solution (Q) as a solution (R) infinitely many solutions (S) no solution (T) at least one solution The correct option is:

Answer: (B)

Solution

Write , , . Dividing the third equation by : . From the first two equations, , so the third equation reduces to . Hence the system is

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Question ID VK-033970