40 pls
Assume S is a recursively defined set, defined by the following properties:
1. T0 = 2
2. Tn = Tn-1 + 2n
3. Tn = Tn-1 + 7n
4. Tn = n^2
Use structural induction to prove that all members of S are numbers of the form 11k+1, with k being a non-negative integer. Your proof must be concise.