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IB 数学(高等级)/向量
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IB Mathematics (HL)
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向量既有大小也有方向。它表示为二维或三维实体。
在二维表述中:r = 7i+8j
在三维表述中:r = 9i+5j+6k
i、j、k 分别表示 x、y 和 z 轴方向上的大小。
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书籍:IB 数学(高等级)
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