1. The problem statement, all variables and given/known data https://holland.pk/uptow/i4/d6adf6b4297ef9c8c20c3e58ec66535d.png 2. Relevant equations integration 3. The attempt at a solution https://holland.pk/uptow/i4/36ea9fcf0a17f1ea8137f0140c881289.jpg I have got stuck at this step... And have no idea on how to go on to the form suggested in the question. Can anyone tell me how to do this question? Thank you very much!