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Question

Calculate the scalar product of the following vectors.
Given a cube ABCD A1B1C1D1 with lower base ABCD, upper base A1B1C1D1, and lateral edges AA1,BB1,CC1,andDD1. Prove that on the straight line (MM1), where M and M1 are the centres of the faces ABCD and A1B1C1D1, respectively, there is a point O such that
OA+OB+OC+OD=OM1. show that MO=λOM1andfindλ.

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