A commutative ring with unity and Ideals

  • Thread starter emptyboat
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  • #1
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Main Question or Discussion Point

Let R be a commutative ring with unity. I and J are ideals of R.
Show that If I + J = R, then I∩J=IJ.

I know that IJ⊆(I∩J).
But I can't do inverse.
 
Last edited:

Answers and Replies

  • #2
21
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I solve it!
Thus no answer is required. :)
 

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