The diagram below shows the curve [latex]y=\text{f’}\left( x \right).[/latex]
(a)
State the [latex]x[/latex]-coordinates of the stationary points for the curve [latex]y=\text{f}\left( x \right).[/latex]
Hence determine the nature of these stationary points.
(b)
State the maximal range of values of [latex]x[/latex] such that the curve [latex]y=\text{f}\left( x \right)[/latex] is,
(i) concave downwards,
(ii) increasing.