Linear combinations and span (video) | Khan Academy

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Likewise, if I take the span of just, you know, let’s say I go back to this example right here. My a vector was right like that. Let me draw it in a better color. My a vector looked like that. If I were to ask just what the span of a is, it’s all the vectors you can get by creating a linear combination of just a. So it’s really just scaling.

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