Start off with the substitution u = x/4. Then du = dx/4, so that integral(exp(x/4)dx) = 4*integral(exp(u)du). This last integral yields 4 * exp(u) + C. Back substituting, you get 4 * exp(x/4) + C as the solution.
May 3rd, 2015
Did you know? You can earn $20 for every friend you invite to Studypool!