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प्रश्न
If A = [4 7] and B = [3 l], find : 2A - 3B
उत्तर
A = `[4 , 7]_(1 xx 2)` B = `[(3 , 1)]_(1 xx 2)`
2A - 3B = `[(8 , 14)] - [(9 , 3)]`
= `|(-1 , 11)|_(1 xx 2)`
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