Question

The marginal revenue (in thousands of dollars) from the sale of x tractors is
R'(x)=2x(x^2+10)^2/1000
Find the revenue function R if the revenue from the sale of 4 tractors is $198,000.

Answer 1

ooh a economics question...kinda
basically you have to integrate R'(x) to find R(x)
do this by substituting
u = x^2 + 10
du = 2x dx --> dx = du/2x

leaving
\[\frac{1}{1000}\int\limits_{}^{}u^{2} du\]