Let G = GL(2, R) be the group of all 2 2 matrices with real entries
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Question:
Let G = GL(2, R) be the group of all 2 × 2 matrices with real entries and a nonzero determinant.
Let H = SL(2, R) be the set of all 2 × 2 matrices with real elements and determinant equal to 1.
Test it
a) H is a normal subgroup in G.
b) G/H is isomorphic to the multiplicative group of reals * , · >
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