If $$A=1$$ −$$2$$ $$3$$,$$B=2$$−$$3$$−$$1$$, then AB is equal to

Correct option is 4none of these

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If $A = [\begin{array}{lll} 1 - 2 3 \end{array}], B = [\begin{array}{r} 2 \\ - 3 \\ - 1 \end{array}]$ , then AB is equal to

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2−3−1

26−3

2 6−3

none of these

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detailed solution

Correct option is D

AB=1 −2 32−3−1=2+6−3=[5]

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If A=1 −2 3,B=2−3−1, then AB is equal to

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Ready to Test Your Skills?

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If $A = [\begin{array}{lll} 1 - 2 3 \end{array}], B = [\begin{array}{r} 2 \\ - 3 \\ - 1 \end{array}]$ , then AB is equal to