Q.If ˆ ˆ ˆ a i j k, = − + = − + = − + = − + ˆ ˆ ˆ b i 2j k = + − = + − = + − = + − and ˆ ˆ ˆ c 3i pj 5k = + + = + + = + + = + + are coplanar, then p is equal to
Correct answer: –6
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