Using the rationalizing substitution t = +4 we find (x+1) 4 4dr R(t)dt, where R(t) is a polynomial in t (i) R(t) sqrt(t)(t-3) By the above substitution, or some other way, we find (x + 1) + 4dr = (x+4)% (ax + b) + C. 15 where a and b are numbers that can be determined. (ii) a 1 b4 Note: You can earn partial credit on this problem