Jambmaths question:
Find the slope of the curve $y=2{{x}^{2}}+5x-3$at (1,4)
Option A:
4
Option B:
6
Option C:
7
Option D:
9
Jamb Maths Solution:
$\begin{align} & y=2{{x}^{2}}+5x-3 \\ & \frac{dy}{dx}=4x+5 \\ & Slope=\frac{dy}{dx} \\ & \text{At point (1,4)} \\ & \frac{dy}{dx}\left| _{(1,4)} \right.=4(1)+5=9 \\\end{align}$
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