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Question
If A = `[(1, 4),(2, 3)]` and B = `[(1, 2),(3, 1)]` Compute 3A + 4B
Solution
A = `[(1, 4),(2, 3)]`
B = `[(1, 2),(3, 1)]`
3A + 4B = `3[(1, 4),(2, 3)] +4[(1, 2),(3, 1)]`
= `[(3, 12),(6, 9)] + [(4, 8),(12, 4)]`
= `[(3 + 4, 12 + 8),(6 + 12, 9 + 4)]`
= `[(7, 20),(18, 13)]`.
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