1.

Let bara= 4bari-3barj+5bark . A vector b is coplanar with bari, barj" and orthogonal to " bara " and has magnitude " absbara, " then " barb is

Answer»

`pmsqrt2(3bari+4barj)`
`pmsqrt2(bari+4barj)`
`pmsqrt2(3bari+barj)`
`pmsqrt2(3bari+5barj)`

ANSWER :A


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