Minor Typo in Solution to Problem 7.6

Becky Shipley points out: "There is a minor typo in the solution to qu 6 from sheet 7- at the top of page 3 the initial condition should be y(0)=1 (not y(0)=0) to get C_2 and hence eqn (6)."

I don't have the latex file for that solution (just the .pdf), so I am announcing the correction here rather than updating the file.