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    How Do Rank Properties of Idempotent Matrices Affect Their Sum?

    how can i find an equation for the plane spanned by the vectors V1=(-1,1,1) and V2=(3,4,4).
  2. 2

    How Do Rank Properties of Idempotent Matrices Affect Their Sum?

    how can i express (-9-7x-15x^2) as a linear combination of F1 (2+x+4x^2) , F2 (1-x+3x^2) and F3 (3+2x+5x^2).
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