org-mode export with utf8x instead of utf8

Question

All the fancy characters like ∧, ∀, and ∃ don't have codepoints in the utf8 inputenc package, but the utf8x does. How do I tell emacs to pass the utf8x option when I generate a pdf via org-export?

Answer 1

For example, following way:

#+LATEX_HEADER: \usepackage[utf8x]{inputenc}

More examples you can find in following file...