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Let veca=hati+hatj+hatk, vecb=hati-hatj+...

Let `veca=hati+hatj+hatk, vecb=hati-hatj+2hatk and vecc=xhati+(x-2)hatj-hatk`. If the vector `vecc` lies in the plane of `veca and vecb` then x equals (A) 0 (B) 1 (C) -4 (D) -2

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