Given the following:

$f(x)=xlog(x)+5x$

$g(x)=x^{\frac{1}{2}}+3x$

Which statement is correct?

$f(x)$ is Oh of $g(x)$

$g(x)$ is Oh of $f(x)$

$f(x)$ is Theta of $g(x)$

$g(x)$ is Theta of $f(x)$

I need to learn this.