9. For the given function $f(x)=2^{x}-2^{-x}$, there are the following four conclusions: A. The graph of $f(x)$ is symmetric about the origin; B. $f(x)$ is an increasing function on $(-\infty,+\infty)$; C. $f^{-1}(2)=\log _{2} 3$; D. $f|x|$ has a minimum value of 0. The correct conclusions are $\qquad$ .
9. A, B, D.