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I have trouble by using Mathemtica to solve the following problem as shown on the attachment. You see that the two recursive relations depend one another. I plan to write a "For" loop to evaluate E, instead of using Rsolve (a build-in function in Mathematica), however, I am very new in using Mathematica. Please help! Thank you~

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# Mathematica 8.0 - solve two recursive relations

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