Question

The total revenue in Rupees received from the sale of $x$ units of a product is given by $R(x)=13x^2+26x+15$.The marginal revenue, when $x=7$ is

Answer 1

The correct answer is Rs 208.
Marginal revenue is the rate of change of total revenue with respect to the number of units sold.
$∴Marginal Revenue (MR)=\frac{dR}{dx}=13(2x)+26=26x+26$
When $x = 7, MR = 26(7) + 26 = 182 + 26 = 208$
Hence, the required marginal revenue is Rs 208.