Guild Wars 2

I just bought my first ascended Amulet. I am wondering if i put infusion rank 1 and later if i find infusion rank 9, can i take out the rank 9 and add rank 1 to my amulet?

For legendary weapons is it true that you can change the infusion? for example if i got infusion A and letter i find that infusion B is better can i change to B?

IAMCHINESEANDLOVEWHITEGIRL.9314:

I just bought my first ascended Amulet. I am wondering if i put infusion rank 1 and later if i find infusion rank 9, can i take out the rank 9 and add rank 1 to my amulet?

You can only put +1 infusion on infused ascended items.
Check this guide: http://dulfy.net/2013/11/28/gw2-agony-infusions-slot-and-agony-resist-guide/

For legendary weapons is it true that you can change the infusion? for example if i got infusion A and letter i find that infusion B is better can i change to B?

Yes you can. But A will be lost.

thank you so much!