20. Let $f ( x ) = a ^ { 2 } x ^ { 2 } + a x - 3 \ln x + 1$, where $a > 0$. (1) Discuss the monotonicity of $f ( x )$; (2) If the graph of $y = f ( x )$ has no common points with the $x$-axis, find the range of values for $a$.
20. Let $f ( x ) = a ^ { 2 } x ^ { 2 } + a x - 3 \ln x + 1$, where $a > 0$.\\
(1) Discuss the monotonicity of $f ( x )$;\\
(2) If the graph of $y = f ( x )$ has no common points with the $x$-axis, find the range of values for $a$.