Physics, asked by bhararth5007N, 1 month ago

please answer the question

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Answered by shrabantijana5811

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Answer:

A=3i-4j and B=-i-4j

A+B=(3i-4j-i-4j)=2i-8j

lA+Bl=√(2^2+8^2) =√(4+64) =√68=2√17

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