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Let vec b= 3 hat j +4 hat k, vec a=hat i...

Let `vec b= 3 hat j +4 hat k`, `vec a=hat i +hat j` and let `vec b_1 and vec b_2` be component of vector b parallel and perpendicular to `vec a`. If `vec b_1= 3/2 hat i +3/2 hat j` then `vec b_2` is equal to

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