OlympiadSuperchallengeOlympiad Number Theory ShareOlympiad Number Theory · Superchallenge problemA function f:Z→Zf : \mathbb{Z} \to \mathbb{Z}f:Z→Z satisfies f(1)=2f(1) = 2f(1)=2 and f(x+y)=f(x)+f(y)+6xyf(x + y) = f(x) + f(y) + 6xyf(x+y)=f(x)+f(y)+6xy for all integers x,yx, yx,y. Determine f(18)f(18)f(18).Check Show answer Walk through it step by step Practice more like this Review this concept