Here's the problem i need help on. It can be found in Nagle's Differential Equations 8th edition chapter 8.3 number 32.
http://hostingbytes.us/images/3/6025942.jpg
i first tried to solve this using the power series and got:
a2=a0
a(k+2) = 2ak/(k+2)
after this, i have no idea how to...