# Answer to Question #22542 in Abstract Algebra for ekra

Question #22542

If R is a ring with identity, then prove that

<a> =\left \{ \sum_{finite}^{n} s_{ia}t_{i}; s_{i}, t_{i}\epsilon R\right \} =RaR

<a> =\left \{ \sum_{finite}^{n} s_{ia}t_{i}; s_{i}, t_{i}\epsilon R\right \} =RaR

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