Try braces about the “12” as in

\sqrt{12}{a^{11}}

Alan

On Mon, Sep 23, 2013 at 3:55 AM, Xan <dxpublica@telefonica.net> wrote:

Hi,

\sqrt[12]{a^{11}}

produces me:

\sqrt[1]{2} a^{11}

What happens there?

Xan.
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