# recursive relation with sequences

I am not sure how to properly do this question but I am told that the solution I came up with is wrong and I dont see how...I basically used algebra and plugging of variables and rearranging equations and used the given identities to prove my claim but its wrong so I hope someone can show me how to do this properly..

Above is the question and below is my solution.

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What was the formula you came up with for $t_n$? – JavaMan Jan 24 '12 at 6:19
You see the equation for Sn? I isolated Tn in there and then plugged that Tn into the equation for Tn so I had Tn= Sn-S(n-1) I have it circled or squared in my solution in middle of page..Also can you please tell me how you properly write subscripts and superscripts and formulas on this forum so in the future I can improve – Raynos Jan 24 '12 at 6:23

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