3 I d.:. HE: +9.14 Consider the indenite integral f The most appropriate substitution to simplify this integral is u = 2 Then d'u = 2 d;- (ll in the blank with a suitable constant or function of 1']: and so 1'3 air = cdu, for the constant c = 2 After making the substitution we obtain the integral fft) du, where u] = I This last integral. when evaluated, is 2 After substituting back for u we obtain the following nal form of the answer: 33 d3= I fw5+914