The total revenue in rupees received from the sale of x units of a product is given by R(x) = 13x2 + 26x + 15. Then, the marginal revenue in rupees, when x = 15 is
116
126
136
416
D.
416
Given, R(x) = 13x2 + 26x + 15
Now, the marginal revenue =
=
= 16x + 26
Therefore, marginal revenue at (x = 15)
= 26 x 15 + 26
= 390 + 26 = 416
The value of x in the interval [ 4, 9] at which the function f(x) = satisfies the mean value theorem is
If A = is a matrix satisfying AAT = 9I3, then the values of a and b are respectively.
1, 2
- 1, 2
- 1, - 2
- 2, - 1