4 A curve has equation
$$y = \frac { x ^ { 2 } } { 8 } + 4 \sqrt { x }$$
4
- Find an expression for \(\frac { \mathrm { d } y } { \mathrm {~d} x }\)
4 - The point \(P\) with coordinates \(( 4,10 )\) lies on the curve.
Find an equation of the tangent to the curve at the point \(P\)
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4 - Show that the curve has no stationary points.