# Question in ring

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

## Answers and Replies

Why would you not be able to get a solution just because this is from the book?

HallsofIvy
Science Advisor
Homework Helper
Start with the definition: What is the definition of "maximal ideal"?