Réponses

2013-11-29T16:13:43+01:00
F(x) = x²-3

F(0)= -3
F(1)= -2
F(-5)= 22
F(0,1) = -2,99
F(racine(3)) = 0
F(-0,5) = -2,75

31) (t-1)²

a m(0) = 1
b m(1) = 0
c m(-9) = 100

d, (t-1)²=-4
(t-1)²+4=0
t²-2t+1+4=0 -> t²-2t+5=0

delta = -16 donc pas de racines

(t-1)²=16
(t-1)²-16=0
t²-2t+1-16=0
t²-2t-15=0

delta=64

racines (antécédents)=5 et -3