Tamil Nadu Board of Secondary EducationHSC Arts Class 12

Choose the correct alternative: If A = [7342] then 9I2 – A = - Mathematics

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MCQ

Choose the correct alternative:

If A = `[(7, 3),(4, 2)]` then 9I2 – A =

Options

  • `"A"^-1`

  • `"A"^-1/2`

  • `3"A"^-1`

  • `2"A"^-1`

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Solution

`2"A"^-1`

Concept: Inverse of a Non-singular Square Matrix
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Chapter 1: Applications of Matrices and Determinants - Exercise 1.8 [Page 48]

APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 12th Mathematics Volume 1 and 2 Answers Guide
Chapter 1 Applications of Matrices and Determinants
Exercise 1.8 | Q 5 | Page 48

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