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# Modern algebra

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(a) Let G = GL(2,R) be the general linear group. Let
H=GL(2,Q) and K= SL(2,R) = {A is an element of G: det (A) =1} Show that H,K are subgroups of G

(b) Let p be a prime number and a is an element of Z. Prove that a^p ,is equivalent to, a mod p

##### Solution Summary

There are two proofs here, one regarding subgroups of the general linear group and one involving prime numbers and modular arithmetic.

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Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

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