Bitsat
Vector Algebra
BITSAT 2020
MCQ+3 / -12020
If \(a = - \widehat i + \widehat j + \widehat k\) and \(b = 2\widehat i + \widehat k\), then find z component of a vector r, which is coplanar with a and b, r . b = 0 and r . a = 7.
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