Question 550915
{{{ root( 3, 54*x^10 ) = root( 3, 27*2*x^9*x ) }}}
{{{ root( 3, 27*x^9 ) * root( 3, 2x ) }}}
{{{ 3x^3*root( 3, 2x) }}} answer
Note that {{{ x^9 = x^3*x^3*x^3 }}}
so, {{{ root( 3, x^9 ) = x^3 }}}