- #1

M. next

- 382

- 0

Then it was set equal to: [itex]\sum[/itex] x [itex]^{2n}[/itex]/2n! + [itex]\sum[/itex] x [itex]^{2n+1}[/itex]/(2n+1)!

Note: summation in all was from zero to infinity..

How did this take place??

Thanks