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Question
If matrix A = `[(2, 2),(0, 2)]` and A2 = `[(4, x),(0, 4)]`, then the value of x is ______.
Options
2
4
8
10
Solution
If matrix A = `[(2, 2),(0, 2)]` and A2 = `[(4, x),(0, 4)]`, then the value of x is 8.
Explanation:
Given, matrix A = `[(2, 2),(0, 2)]`.
Then A2 = `[(2, 2),(0, 2)][(2, 2),(0, 2)] = [(4, 8),(0, 4)]`
On comparing it with A2 = `[(4, x),(0, 4)]`, we get that
x = 8
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