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13. Derivative as a Rate Measurer
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Q9 of 78 Page 13

The total revenue received from the sale of x units of a product is given by R(x) = 13 x2 + 26 x + 15. Find the marginal revenue when x = 7?

Given: Total Revenue, R(x) = 13 x2 + 26 x + 15


Where x = number of units.


Marginal Revenue is given by,


M(x) =


Therefore,


M(x) = 26 (x + 1)


For x = 7,


M(x) = 26(7 + 1)


M(x) = 26 × 8 = Rs. 207


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