Question: Exercise 1.8. Let R be a ring. If a: E nilrad(R) and u is a unit in R, show that u + a: is a

Exercise 1.8. Let R be a ring. If a: E nilrad(R)
Exercise 1.8. Let R be a ring. If a: E nilrad(R) and u is a unit in R, show that u + a: is a unit, and in particular, 1 + as is a unit

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