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Linear Alegbra: Span of Dimension

What is the span of the dimension of...
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over P3
v1=x^2, v2=1-x^2, v3=1

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over C[0,1]
v1=cosx, v2=cos2x, v3=1

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over R3,
v1=(2,2,1),v2=(-3,0,-1),v3=(-4,2,-1)

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Solution Summary

Spans of dimension are identified. The solution is detailed and well presented.

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