Réponses

2013-03-11T17:37:03+01:00

g

R\{2}

 

h

(x-1) (2x+1)=0

2x^2+x-2x-1=0

2x^2-x-1=0

 

delta=1+8=9

 

donc 2 racines:

x1=-7/8

x2=10/8=5/4

 

R\{-7/8;5/4}

 

k

R\{-1}

 

f

R\{4/5}