There is a typo , $sorry$ the $2nd$ equation should be-
$2(POS) = x/2 - 2019/2$
samiul_samin wrote: ↑Sun Feb 10, 2019 3:59 pmHintsoyeb pervez jim wrote: ↑Wed Mar 28, 2018 8:04 pmFor any rational numbers $x, y$ function $f(x)$ is a real number and $f(x+y)=f(x)f(y)-f(xy)+1$. Again $f(2017)\neq f(2018)$. $f(\frac{2017}{2018})=\frac{a}{b}$.Where $a,b$ are co-prime $a+b=?$Answer