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(7) Let R be a ring with 1 and let M be a unital left R-module. If I is a right ideal of R then the annihilator of I in M is

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Let. R be a ring with 1, and M be a unital left ideal R-module. If I is a right ideal of R then the annihilaton of I in M isNow let n E Annm (I). then bnao & bad Now let a GR arbitary, we have to show ant Annm(s). 아빠 M we have. & fanda ne Ann G) > N(b) Take R= Z2, M = 7 (4Z thon find Anom (t). if I = 22 mt M. such that am zo vara 2 u in 43, in Ho Annm (t) = lot Cry, t) .x = 0 mod (3) y = 0 and y= 5 mod (ro). nad (4) z = 0, Z=2 x € 37. a f 52. zt 22. (n,y,z) 32y 5K X2Z. Annm (I) = 374 5742Z. (A

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