If A = 2x2 matrix (1,1,1,1) and B is identity 2x2 (1,0,0,1), find (A + 2B)^-1 (inverse of sum of A plus 2xB.... I am getting lost but assume this question has some obvious pieces I have not gotten to in lectures given the identity is involved... plus 1,1,1,1 seems singular... not sure of how that impacts... any pointers to get me to a full understanding would be helpful.

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