bonsoir
f (x) = 3 x² - 10
f ( - x ) = 3 ( - x² - 10 ) = - 3 x² + 30
- f (x) = - ( 3 x² - 10 ) = - 3 x² + 30
f ( - x ) = - f(x ) donc elle est impaire
f(x)= x ³ - 2 x +7
f ( - x ) = - x ³ - 2 ( - x ) + 7 = - x³ + 2 x + 7
- f (x) = - ( x³ - 2 x + 7 ) = - x³ + 2 x - 7
ni paire ni impaire
continue
