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If A = [5-34-3-21], Prove that (2A)T = 2AT - Mathematics and Statistics

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प्रश्न

If A = `[(5, -3),(4, -3),(-2, 1)]`, Prove that (2A)T = 2AT 

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उत्तर

A = `[(5, -3),(4, -3),(-2, 1)]`

∴ 2A = `2[(5, -3),(4, -3),(-2, 1)] = [(10, -6),(8, -6),(-4, 2)]`

∴ (2A)T = `[(10, 8, -4),(-6, -6, 2)]`  ...(i)

AT = `[(5, 4, -2),(-3, -3, 1)]`

∴ 2AT = `[(5, 4, -2),(-3, -3, 1)]`

= `[(10, 8, -4),(-6, -6, 2)]`  ...(ii)

From (i) and (ii), we get

(2A)T = 2AT 

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पाठ 4: Determinants and Matrices - Exercise 4.7 [पृष्ठ ९७]

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बालभारती Mathematics and Statistics 1 (Arts and Science) [English] Standard 11 Maharashtra State Board
पाठ 4 Determinants and Matrices
Exercise 4.7 | Q 3 | पृष्ठ ९७
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