MathDB
1988 USAMO Problem 5

Source:

July 27, 2011
AMCUSA(J)MOUSAMOalgebrapolynomialalgebra unsolved

Problem Statement

A polynomial product of the form (1z)b1(1z2)b2(1z3)b3(1z4)b4(1z5)b5(1z32)b32,(1-z)^{b_1}(1-z^2)^{b_2}(1-z^3)^{b_3}(1-z^4)^{b_4}(1-z^5)^{b_5}\cdots(1-z^{32})^{b_{32}}, where the bkb_k are positive integers, has the surprising property that if we multiply it out and discard all terms involving zz to a power larger than 3232, what is left is just 12z1-2z. Determine, with proof, b32b_{32}.