I discovered a mathamatical truth that seems to have no clear logical foundation. Could anyone here explain the math behind the following?(adsbygoogle = window.adsbygoogle || []).push({});

A.Given the following recursive series:

S(1) = 3

S(2) = 2

S(n) = 6*S(n-1) - S(n-2) - 4

Define a new series as follows

N(i) = (S(i) + S(i+1) + 1)/2

B.Now note that for all i

1) S(i)*S(i+1) = N(i)*(N(i) + 1)/2

2) (N(i) + N(i +1) + 1)/4 = S(i+1)

3) N(i)*N(i+1)/4 = S(i+1)*(S(i+1) + 1)/2

C. A even more amazing paradox is that you can rewrite line 2 of part A as S(2) = 12, and make no other changes except to redo the math. Still B1, B2, and B3 again hold true!

What factors lurk in the background of this paradox?

Could yet another number be substituted for the numbers 2 or 12 in line 2 of part A?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Mathematical Paradox

**Physics Forums | Science Articles, Homework Help, Discussion**