The sum of two vectors A and B is 5i+j and their difference is 3i-2j . The vector A then is ? a. (8i+j) b. 2i-5j c.i-2.5j d. none  

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`A+B=5i+j`

`A-B=3i-2j`

`A=4i-(1/2)j`

Ans  D

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