1. Puissances entières 2. Puissance nulle 3. Puissances négatives 4

x n
xnx×x×x ... ×x
| {z }
xn+px×x×x ... ×x
| {z } x×x×x ... ×x | {z } ×x×x×x ... ×x | {z }
xn+p=xn×xp
xn×px×x×x ... ×x
| {z } x×x×x ... ×x | {z } ... ×x×x×x ... ×x | {z }
×
xn×xn×xn... ×xn
| {z }
xn×p= (xn)p
xn+0 =xn×x0
xn+0 =xn
xn×x0=xnxnx0= 1
1 = x0=xn−n=xn×x−n
x−n= 1/xn
x=upx1/p = (up)1/p =up×(1/p)=u1=u
p
√x=p
√up=u
p
√x=x1/p