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Answers for “如果我们选择完全不同的向量作为基础而不是 $\hat{i}$ 和 $\hat{j}$,会发生什么?”

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The video reinterprets a coordinate pair like (3,−2)(3, -2) not merely as a static location on a grid, but as dynamic scaling factors. The first number scales the horizontal unit basis vector i^\hat{i}, and the second number scales the vertical unit basis vector j^\hat{j}.

Conditions: Working in a standard 2D Cartesian coordinate system.; Understanding i^\hat{i} and j^\hat{j} as the standard unit basis vectors.