1. **State the problem:** Find the coordinates of the turning point of the curve given by the function $$y = \frac{x^2}{2} + 8x$$.
2. **Recall the formula and rules:** The turning point of a curve given by a function $y=f(x)$ occurs where the derivative $\frac{dy}{dx}$ equals zero. This is because the slope of the tangent line at the turning point is zero.
3. **Find the derivative:**
$$\frac{dy}{dx} = \frac{d}{dx}\left(\frac{x^2}{2} + 8x\right) = \frac{d}{dx}\left(\frac{1}{2}x^2\right) + \frac{d}{dx}(8x) = x + 8$$
4. **Set the derivative equal to zero to find critical points:**
$$x + 8 = 0$$
$$x = -8$$
5. **Find the y-coordinate of the turning point by substituting $x = -8$ back into the original function:**
$$y = \frac{(-8)^2}{2} + 8(-8) = \frac{64}{2} - 64 = 32 - 64 = -32$$
6. **Conclusion:** The turning point of the curve is at the coordinates $$(-8, -32)$$.
Turning Point A20222
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