vinschupachups31620

bonjour

f (x) = 8 x

f ( 2) = 8*2 = 16

f ( - 3 ) = - 24

f ( 0 ) = 0

f ( 5) = 40

8 x = - 16

x = - 16/8 = - 2

8 x  = 0

x = 0

8 x  = 28

x = 28/8 = 7/2