if f(x)=x 7 and g(x)=1/x-13, what is the domain of (fOg)(x)?
{x[[x≠6}
{x[x≠-6}
{x[x≠-13}
{x[x≠13}
{x[[x≠6}
{x[x≠-6}
{x[x≠-13}
{x[x≠13}