Q9 of 29 Page 1

Find:



We know that,


S0,


Hence,


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7

Differentiate with respect to x.

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The total revenue received from the sale of x units of a product is given by R(x) = 3x2 + 36x + 5in rupees. Find the marginal revenue when x = 5, whereby marginal revenue we mean the rate of change of total revenue with respect to the number of items sold at an instant.

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Solve the differential equation

11

If and then find the angle between .