Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
a(n+2)=2a(n+1)-3a(n) ;a(1)=1 ;a(2)=-1
a(n+2)=2a(n+1)-3a(n) ;a(1)=1 ;a(2)=-1
Natural Language
Math Input
Extended Keyboard
