6 A curve has equation \(y = \mathrm { f } ( x )\). It is given that \(\mathrm { f } ^ { \prime } ( x ) = 3 x ^ { 2 } + 2 x - 5\).
- Find the set of values of \(x\) for which f is an increasing function.
- Given that the curve passes through \(( 1,3 )\), find \(\mathrm { f } ( x )\).