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
The value of x in the interval [ 4, 9] at which the function f(x) = satisfies the mean value theorem is
If n(A) = 8 and , then is equal to
2
4
6
8
C.
6
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