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Question

Find A×B, if A=^i+4^k and B=^j?

A
4^i^k
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B
4^i+^k
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C
^i4^k
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D
4^i^k
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Solution

The correct option is D 4^i^k
(A×B)=(^i+4^k)×(^j)
=(^i×(1)^j)+(4^k×(1)^j)=^k+4^i

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