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# Solution - If a = [(3,1),(-1,2)] A2 – 5a + 7i = O. Hence Find A–1. - CBSE (Arts) Class 12 - Mathematics

ConceptAdjoint and Inverse of a Matrix

#### Question

if A = [(3,1),(-1,2)] show that A2 – 5A + 7I = O. Hence find A–1.

#### Solution

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#### APPEARS IN

NCERT Mathematics Textbook for Class 12 Part 1 (with solutions)
Chapter 4: Determinants
Q: 13 | Page no. 132

#### Reference Material

Solution for question: If a = [(3,1),(-1,2)] A2 – 5a + 7i = O. Hence Find A–1. concept: null - Adjoint and Inverse of a Matrix. For the courses CBSE (Arts), CBSE (Commerce), CBSE (Science)
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