Puissances
A^n/A^p = A^n-p
A^-n = 1/A^n
A^n/B^n = (A/B)^n
A^n*A^p = A^n+p
A^n*B^n =
(A*B)^n
(A+B)^2
=A^2+B^2+2AB
(A-B)^2=
A^2+B^2-2AB
(A-B)(A+B)=A^2-
B^2
Fractions
a/b=c/d a*d=b*c
a/b+c/d=
a*d+b*c/b*d
a/b*x/y = a*x/b*y
a/b/x/y=a/b*y/x
a/b/x=
a/b*x=a/b*1/x
Pourcentage
X++=(1+a%) (1+b
%)X
(Vf-Vi/Vi)100 =taux
%
Vi=Vf/% (ex:0,8)
Combinatoire
n!/(n-p)! (ex:
podium)
n*p (ex+: phone
cases)
n! (permutations)
n!/p!(n-p)!
(combinaisons)
Geometrie
P : Cercle+: 2piR
Triangle iso+: b+2c
Equilatéral+:+3c
Rectangle+prlgm:
2(L*l)
Carre Losange+: 4c
