Question 71
Determine all functions $f$ such that
$$
f(xf(y)+y)=f(xy)+f(y)
$$
for all real numbers $x,y$.
$$
f(xf(y)+y)=f(xy)+f(y)
$$
for all real numbers $x,y$.
MathNet 2021 — Part 08 Question 71
Math Olympiad Vault · MathNet 2021 — Part 08
Math Olympiad Vault · MathNet 2021 — Part 08