Plz help me with final part of this question

1 t t at + and in the last integral make the substitution u = Changing the limits of integration in the last integral, when t = x we have u 1 and when t = xy we simplify to get u V Part 2 of 3 Since u = then we can write t in terms of u and x as t ux SO ux Part 3 of 3 t du Now since u = H then so dt dt du. Putting these last two results together and simplifying, we can write - dt entirely in terms of u t as dt du