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If unit vectors hati and hatj are at rig...

If unit vectors `hati and hatj` are at righat angle to each other and `vecp=3hati+3hatj,vecq=5hati,4vecr=vecp+vecq, then 2vecs=vecp-vecq` (A) `|vecr+kves|=|vecr-kvecs|` for all real k (B) `vecr` is perpendicular to `vecs` (C) `vecr+vecs` is perpendicular to `vecr-vecs` (D) `|vecr|=|vecs|=|vecp|=vecq|`

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