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.
Détermine x tel que 3x - 1 , x + 5 , 2x + 9 forment une PA
Détermine x tel que 3x - 1 , x + 5 , 2x + 9 forment une PA
Natural Language
Math Input
Extended Keyboard
