Browse · MATH Print → jmc algebra intermediate Problem The function f(x) satisfies f(x−y)=f(x)f(y)for all real numbers x and y, and f(x)=0 for all real numbers x. Find f(3). Solution — click to reveal Setting x=3 and y=23, we get f(23)=f(3)f(23).Since f(23)=0, we can divide both sides by f(23), to get f(3)=1. Final answer 1 ← Previous problem Next problem →