[中學] 向量內積分配律
想請問向量的分配律該怎麼證明?
a。(b + c) = a。b+ b。c
(a + b)。(c + d) = a。c + b。c + a。d + b。d
a b c d 皆為向量 非實數
謝謝 !!
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