bonjour
f (x) = 4 x + 1
fonction affine , de type ax + b
f ( -1) = - 4 + 1 = - 3
4 x + 1 = 15
4 x = 15 - 1
4 x = 14
x = 14/4 = 7 /2
f ( 0) = 1
f ( 1) = 4 + 1 = 5
C 1 ( 0 ; 1 ) et ( 1 ; 5 )
g (x) = - 3 x
fonction linéaire
g ( - 1 ) = 3
- 3 x = 15
x = - 15/3 = - 5
g ( 0) = 0
C 2 ( 0 ; 0 ) ( - 1 ; 3 )
h (x) = 5
fonction constante
h ( -1) = 5
antécédent de 15 = 5
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bonjour
f (x) = 4 x + 1
fonction affine , de type ax + b
f ( -1) = - 4 + 1 = - 3
4 x + 1 = 15
4 x = 15 - 1
4 x = 14
x = 14/4 = 7 /2
f ( 0) = 1
f ( 1) = 4 + 1 = 5
C 1 ( 0 ; 1 ) et ( 1 ; 5 )
g (x) = - 3 x
fonction linéaire
g ( - 1 ) = 3
- 3 x = 15
x = - 15/3 = - 5
g ( 0) = 0
C 2 ( 0 ; 0 ) ( - 1 ; 3 )
h (x) = 5
fonction constante
h ( -1) = 5
antécédent de 15 = 5