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Questions › JNU › JNU SIS 2018 › Q1
2 marks, −1Mathematics › Matrices, determinants and linear systems › Solving linear systemsEasyabout 1 min

JNU SIS 2018 Question 1: Matrices, determinants and linear systems

Suppose AB=[54−23]AB = \begin{bmatrix} 5 & 4 \\ -2 & 3 \end{bmatrix}AB=[5−2​43​] and B=[7321]B = \begin{bmatrix} 7 & 3 \\ 2 & 1 \end{bmatrix}B=[72​31​]. Find AAA.

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Suppose AB = [5 4; -2 3] and B = [7 3; 2 1]. Find A. (A) [1 -3; -2 7] (B) [11 -17; -27 41] (C) [13 43; 4 18] (D) [-3 13; -8 27]

Matrices, determinants and linear systems has come up 102 times in 7 exams since 2006.

What this question tests

This question is on Solving linear systems, part of Matrices, determinants and linear systems in Mathematics.

Finding solutions of simultaneous linear equations by inversion, determinants or elimination.

TestStop has 8 past-paper questions on this subtopic; the nearest in year are below.

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Question from the JNU SIS 2018 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.