(a) Show that µ(A) = µ(A\B) + 4(AN B). (b) Show u(A) + µ(B) = µ(AUB) + µ(An B). Hint: One way to do this is to use (a) and recall that (A\B)(B\A) = (AUB) \ (AN B). (c) Show that u(AUB) = µ(A)+µ(B)-u(AnB) provided that u(ANB) E R.
(a) Show that µ(A) = µ(A\B) + 4(AN B). (b) Show u(A) + µ(B) = µ(AUB) + µ(An B). Hint: One way to do this is to use (a) and recall that (A\B)(B\A) = (AUB) \ (AN B). (c) Show that u(AUB) = µ(A)+µ(B)-u(AnB) provided that u(ANB) E R.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter5: Rings, Integral Domains, And Fields
Section5.1: Definition Of A Ring
Problem 14E: Let R be a ring, and let x,y, and z be arbitrary elements of R. Complete the proof of Theorem 5.11...
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