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Find the matrix X such that AX = I where A = [61713]

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प्रश्न

Find the matrix X such that AX = I where A = `[(6, 17),(1, 3)]`

योग
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उत्तर

Given, AX = I

∴ `[(6, 17),(1, 3)]` X = `[(1, 0),(0, 1)]`

Applying R1 ↔ R2, we get

`[(1, 3),(6, 17)]` X = `[(0, 1),(1, 0)]`

Applying R2 → R2 – 6R1, we get

`[(1, 3),(0, -1)]` X = `[(0, 1),(1, -6)]`

Applying R1 → R1 + 3R2, we get

`[(1, 0),(0, -1)]` X = `[(3, -17),(1, -6)]`

Applying R2 → (–1) R2, we get

`[(1, 0),(0, 1)]` X = `[(3, -17),(-1, 6)]`

∴ X = `[(3, -17),(-1, 6)]`

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Elementry Transformations
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