Let-R-be-a-cummutative-ring-with-1-and-a-b-member-of-R-Suppose-a-is-invertible-and-b-is-nilpotent-Show-that-a-b-is-invertible-

Question Number 12843 by tawa last updated on 04/May/17

Let R be a cummutative ring with 1 . and a, b member of R . Suppose a is

invertible and b is nilpotent . Show that a + b is invertible .