Question 36

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Jambmaths question: 

Find the slope of the curve $y=2{{x}^{2}}+5x-3$at (1,4) 

Option A: 

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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