how can prove that this array: can be written as a linear combination in group : ؟.

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Originally Posted by suliman how can prove that this array: can be written as a linear combination in group : ؟. It is the same with verifying the linear dependence of the vectors. you can just regard the 2*2 matrix as 4*1 vector. So the problem is to check whether the equation groups is solvable.

thank you

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