If vecu= 2hati-hatj+hatk, vecv = hati + ...

If `vecu= 2hati-hatj+hatk, vecv = hati + 2 hatj-3 hatk` and `vecw= 3hati + phatj+ 5 hatk` are coplanar find the value of p.

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The correct Answer is:

`-4`

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