Question: Let R be a commutative ring and let a R. Show that I a = {x R | ax = 0} is an

Let R be a commutative ring and let a ∈ R. Show that Ia = {x ∈ R | ax = 0} is an ideal of R.

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Let x y I a so ax ay 0 Then ax y ax ay 0 0 0 so x y I a Also axy axy 0y 0 so xy I a ... View full answer

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