∀n:ℕ. ((r1 + (r(n)/r(2))) ≤ Σ{(r1/r(i)) | 1≤i≤2^n})
{ InductionOnNat }
.....basecase.....
1. n : ℤ
⊢ (r1 + (r0/r(2))) ≤ Σ{(r1/r(i)) | 1≤i≤2^0}
.....upcase.....
1. n : ℤ
2. 0 < n
3. (r1 + (r(n - 1)/r(2))) ≤ Σ{(r1/r(i)) | 1≤i≤2^n - 1}
⊢ (r1 + (r(n)/r(2))) ≤ Σ{(r1/r(i)) | 1≤i≤2^n}