Question 6. (a) Find all the ideals of a field . Show your working. (b) Prove that if I is an ideal of ring R, then R/I is commutative iff ab- ba € I Va, b € R.

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Chapter2: Second-order Linear Odes
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Question 6.
(a) Find all the ideals of a field F, +, >. Show your working.
(b) Prove that if I is an ideal of ring R, then R/I is commutative iff ab-ba I Va, b € R.
(c) Given two polynomials f(x) = 2x²-3 and g(x) = x²+1 in the polynomial ring Z5 [x], find
unique polynomials u(x), v(x) € Z5[r] such that ged(f(x), g(x)) = f(x)u(x) + g(x)v(x).
Transcribed Image Text:Question 6. (a) Find all the ideals of a field F, +, >. Show your working. (b) Prove that if I is an ideal of ring R, then R/I is commutative iff ab-ba I Va, b € R. (c) Given two polynomials f(x) = 2x²-3 and g(x) = x²+1 in the polynomial ring Z5 [x], find unique polynomials u(x), v(x) € Z5[r] such that ged(f(x), g(x)) = f(x)u(x) + g(x)v(x).
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