Mathematics

Mathematics

Problem

For any two vectors P\mathbf{P} and Q\mathbf{Q}, which relation is always correct? a) P−Q=P+Q\mathbf{P}-\mathbf{Q}=\mathbf{P}+\mathbf{Q} b) P−Q=Q−P\mathbf{P}-\mathbf{Q}=\mathbf{Q}-\mathbf{P} c) P−Q=−(Q−P)\mathbf{P}-\mathbf{Q}=-(\mathbf{Q}-\mathbf{P}) d) P−Q=−(P+Q)\mathbf{P}-\mathbf{Q}=-(\mathbf{P}+\mathbf{Q})

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