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Homework Help: Question in ring

  1. May 26, 2008 #1
    hi , pleasehelp me

    itry to soution this question but ican not , because this out my book


    Show that a proper ideal I of a commmutative ring R is a maximal ideal iff for any ideal A of R either A subset of I or A+I=R
     
  2. jcsd
  3. May 26, 2008 #2
    Why would you not be able to get a solution just because this is from the book?
     
  4. May 26, 2008 #3

    HallsofIvy

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    Science Advisor

    Start with the definition: What is the definition of "maximal ideal"?
     
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