8. Let H be the subset of M2(R) consisting of all matrices of the form a...
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8. Let H be the subset of M2(R) consisting of all matrices of the form a 0 1 for a #0. Is Ha subgroup under matrix multiplication? 8. Let H be the subset of M2(R) consisting of all matrices of the form a 0 1 for a #0. Is Ha subgroup under matrix multiplication?
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