math
posted by bobby .
Use part I of the Fundamental Theorem of Calculus to find the derivative of
g(x)= integrate from 9x to 4x of ((u+4)/(u1))du

since (u+4)/(u1) = 1 + 5/(u1)
integral = u + 5log u [9x,4x]
5(x  log(4x1) + log(9x1))