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If `A=[[1, 2],[ 4, 2]],` then find the value of `k` if `|2A|=k |A|` |
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Answer» `A = [[1,2],[4,2]]` `2A = [[2,4],[8,4]]` `|A| = 2-8 = -6` `|2A| = 8-32 = -24` We are given, `|2A| = k|A|` `:. -24 = k**(-6)` `=> k = 4` |
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