28. What is the average value of y = Ö (2x+1) over the interval [4,12]?

 

A. Ö 3 – 1/3

B. 2(Ö 3 – 1/3)

C. 4

D. 49/12

E. Ö 17

 

 

Solution: The answer is D

 The average value of y over the given interval is by definition,

Let,

 and substitute into the above equation, so that,