0 votes 0 votes Let $f$ be a real valued function on $\mathbb{R}$. If for all real $x$, $$ f(x)+3 f(1-x)=5 $$ holds, then show that $f$ is a constant function. Others isi2019-pcb-mathematics descriptive + – admin asked Aug 8, 2022 • edited Aug 27, 2022 by Lakshman Bhaiya admin 89 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.