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Question
Choose the correct alternative.
If AX = B, where A = `[(-1, 2),(2, -1)], "B" = [(1),(1)]`, then X = _______
Options
`[(3/5),(3/7)]`
`[(7/3),(5/3)]`
`[(1),(1)]`
`[(1),(2)]`
Solution
AX = `[(-1, 2),(2, -1)] [(1),(1)]`
= `[(-1 + 2),(2 - 1)]`
= `[(1),(1)]`
= B
∴ X = `[(1),(1)]`.
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