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If the vectors -3i + 4j - 2k, i + 2k and i - pj are coplanar, then find the value of p.

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If the vectors -3i + 4j - 2k, i + 2k and i - pj are coplanar, then find the value of p.

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Vectors a = -3i + 4j - 2k, b = i + 2k, c = i - pj

∴ -3(0 + 2p) – 4(0 – 2) – 2(-p – 0) = 0 

∴ -6p + 8 + 2p = 0 

∴ -4p = -8 

P = 2.

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