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Answers for “点积对向量加法具有分配律吗?”

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Yes, the dot product distributes over vector addition. This means a⋅(b+c)=a⋅b+a⋅c\mathbf{a} \cdot (\mathbf{b} + \mathbf{c}) = \mathbf{a} \cdot \mathbf{b} + \mathbf{a} \cdot \mathbf{c}.

Conditions: The vectors are in a real inner product space.; The operation is the standard dot product.

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Yes, the dot product is symmetric. This means that for any two vectors a\mathbf{a} and b\mathbf{b}, a⋅b=b⋅a\mathbf{a} \cdot \mathbf{b} = \mathbf{b} \cdot \mathbf{a}.

Conditions: The vectors are in a real inner product space.; The operation is the standard dot product.