If the average value of f(x) f ( x ) on the interval 3≤x≤7 3 ≤ x ≤ 7 is 9, find

Question

(4f(x)−3) dx.

Answer 1

y = x+4 is the line with an average value of 9 on 3≤x≤7 using the point slope equation.

(4f(x)−3) dx says to me to find the derivative of 4f(x) -3

4(x+4) -3 = 4x +13.

dy/dx [4x + 13] = 4