bonjour,
f(x) = 4 ( 2 - x ) - 8
f(x) = 8 - 4 x - 8 = - 4 x donc linéaire
g(x) = ( x - 1)² - x²
g(x) = ( x - 1 - x ) ( x - 1 + x)
g (x) = - 1 ( 2 x - 1 ) = - 2 x + 1 donc affine
h(x) = ( 2 x + 6) / 3 donc affine
i(x) = ( 5 - 2 x ) / 2 + x = affine
j(x) = ( 2 x + 1 )² - 2 x² = 4 x² + 4 x + 1 - 2 x² = 4 x + 1 = affine
f(x) = - 2 x + 7 a = - 2 , b = 7
g(x) = - 5 + 4 x a = 4 et b = - 5
h (x) = - 6 x a = - 6 , fonction linéaire donc ordonnée 0
voilà, continue
