Réponses

2013-03-23T17:23:49+01:00
1) a = h [ (4) - g (2) ] : 4 - 2 = ( 7 - 11 ) : 2 = - 4 : 2 = - 2
2) h (4) = 7
h (4) = a x + b
h (4) = - 2 fois 4 + b
h (4) = - 8 + b = 7 donc b = 7 + 8
b = 15
3) h (x) = - 2 x + 15