bonjour
niveau lycée, je doute ...
( x - 7 )² = x² - 14 x + 49
( 4 x + 1 )² = 16 x² + 8 x + 1
g ( 6) = 15
f (x) = 3 x² - 6 x + 10
f ( - 2) = 12 + 12 + 10 = 34
1 ) proba rouge = 6 /8 = 3 /4
2) proba non rouge = 1 - 3/4 = 4/4 - 3 /4 = 1 /4
3 ) soit v les jetons verts
v / ( 8 + v) = 0.5
v = 4 + 0.5 v
v - 0.5 v = 4
0.5 v = 4
v = 8
il y a 8 verts
8 / 16 = 1 /2 = 0.5
