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If A = [1-23-5-60],B=[-1-24215]andC=[24-1-4-36], find the matrix X such that 3A – 4B + 5X = C. - Mathematics and Statistics

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प्रश्न

If A = `[(1, -2),(3, -5),(-6, 0)], "B" = [(-1, -2),(4, 2),(1, 5)] and "C" = [(2, 4),(-1, -4),(-3, 6)]`, find the matrix X such that 3A – 4B + 5X = C.

बेरीज
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उत्तर

3A – 4B + 5X = C

∴ 5X = C + 4B – 3A

= `[(2, 4),(-1, -4),(-3, 6)] + 4[(-1, -2),(4, 2),(1, 5)] -3[(1, -2),(3, -5),(-6, 0)]`

= `[(2, 4),(-1, -4),(-3, 6)] + [(-4, -8),(16, 8),(4, 20)] - [(3, -6),(9, -15),(-18, 0)]`

= `[(2 - 4 - 3, 4 - 8 + 6),(-1 + 16 - 9, -4 + 8 + 15),(-3 + 4 + 18, 6 + 20 - 0)]`

∴ 5X = `[(-5, 2),(6, 19),(19, 26)]`

∴ X = `1/5[(-5, 2),(6, 19),(19, 26)]`

= `[(-1, 2/5),(6/5, 19/5),(19/5, 26/5)]`

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पाठ 4: Determinants and Matrices - Exercise 4.5 [पृष्ठ ८७]

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बालभारती Mathematics and Statistics 1 (Arts and Science) [English] Standard 11 Maharashtra State Board
पाठ 4 Determinants and Matrices
Exercise 4.5 | Q 4 | पृष्ठ ८७
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