Advertisements
Advertisements
Question
If A = `[(1, -2),(2, -1)], B = [(3, 2),(-2, 1)], C = [(4, 5),(5, 4)]`, compute A(B + C).
Sum
Advertisements
Solution
B + C = `[(3 + 4, 2 + 5),(-2 + 5, 1 + 4)]`
= `[(7, 7),(3, 5)]`
A = `[(1, -2),(2, -1)]`
B + C = `[(7, 7),(3, 5)]`
A(B + C) = `[(1 xx 7 + (-2) xx 3, 1 xx 7 + (-2) xx 5),(2 xx 7 + (-1) xx 3, 2 xx 7 + (-1) xx 5)]`
= `[(7 - 6, 7 - 10),(14 - 3, 14 - 5)]`
= `[(1, -3),(11, 9)]`
shaalaa.com
Is there an error in this question or solution?
