MathDB
Putnam 2009 B2

Source:

December 7, 2009
Putnamintegrationfunctioncalculusalgebrapolynomiallimit

Problem Statement

A game involves jumping to the right on the real number line. If a a and b b are real numbers and b>a, b>a, the cost of jumping from a a to b b is b^3\minus{}ab^2. For what real numbers c c can one travel from 0 0 to 1 1 in a finite number of jumps with total cost exactly c? c?