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Question
If ` A = [(2/3, 1, 5/3), (1/3, 2/3, 4/3),(7/3, 2, 2/3)]` and `B = [(2/5, 3/5,1),(1/5, 2/5, 4/5), (7/5,6/5, 2/5)]` then compute 3A - 5B.
Solution
`3A - 5B = 3 [(2/3, 1, 5/3),(1/3, 2/3, 4/3),(7/3, 2,2/3)] - 5[(2/5, 3/5,1),(1/5, 2/5, 4/5),(7/5, 6/5, 2/5)]`
`= [(2, 3,5),(1,2,4),(7,6,2)]-[(2,3,5),(1,2,4),(7,6,2)] `
`= [(0,0,0),(0,0,0),(0,0,0)]`
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