MathDB
2022 Spring LMT Team 6

Source:

September 1, 2022
algebra

Problem Statement

For all yy, define cubic fy(x)f_y (x) such that fy(0)=yf_y (0) = y, fy(1)=y+12f_y (1) = y +12, fy(2)=3y2f_y (2) = 3y^2, fy(3)=2y+4f_y (3) = 2y +4. For all yy, fy(4)f_y(4) can be expressed in the form ay2+by+cay^2 +by +c where a,b,ca,b,c are integers. Find a+b+ca +b +c.