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As the function is true for all values of $x$ and $y$. Then for $x$ and $y$ be $0$, it should be true. You have to prove that, there exists no other function.
$$f(x^2y)=f(x)–f(y)$$
এমন $w$ টি ফাংশন $f$ রয়েছে যেন $x$ ও $y$ এর সকল বাস্তব মানের জন্য উপরের সমীকরণটি সত্য হয়।
$\frac{w}{5}+\frac{16}{20}=p$ হলে, $p^p+3p=?$
As the function is true for all values of $x$ and $y$. Then for $x$ and $y$ be $0$, it should be true. You have to prove that, there exists no other function.