Jambmaths question:
A trader realizes 10 – x2 naira profit from the sales of x bags of corns. How many bags will give him maximum profit.
Option A:
4
Option B:
5
Option C:
6
Option D:
7
Jamb Maths Solution:
$\begin{align} & \text{Let }y=10x-{{x}^{2}} \\ & \frac{dy}{dx}=10-2x \\ & \text{At max profit }\frac{dy}{dx}=0 \\ & 10-2x=0 \\ & x=5 \\ & \text{The trader must sell 5 bags} \\\end{align}$
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